Going from post 1 onwards:
Animal Mutilations
Cattle Mutilation going by the FBI files from the 1970's located at:
http://foia.fbi.gov/ufoanim.htm titled: "Animal Mutilations"
What seems to be the main angle of investigation was local cult activity in all the areas that such occurances occured. For instance it's known that animal sacrifices still occur in South America and Mexico in conjunction with some of the Religious cerimonies that occur at particular ritual sites that have existed since Aztec/Mayan times.
Most of the Mutilation accounts were occuring in Southern state areas that are bordering with Mexico, so it is possible that some imigrants might have done some of these mutilations at particular times during the year.
Other speculative theory indicates "Voodoo", where some preportions of an animal would be used.
Further still such occurances in South America can also be attributed to the drugs trade, the usage of "scare mongering" through the conspiracy of Animal Mutilations and "Chupacobras" is usually enough to keep the simple villagers and towns folk away from their base of operations. (Bit like the old medieval method of placing an enemies head on a spike near your camp.)
Inhumane Testing/Abductions etc
It is a known fact that inhumane testing exists, although the usual culprits that some people point to are probably just a sharade generated by the puppet engineers of a shadow project.
It's known that people have been subjected to torturous experiments, notibly all seem to have one common factor, they are usually about the human mind.
To give it some sort of perspective you have to understand that during the 1930's and the start of the 1940's, the Nazi regime of that time was being manipulated by the use of people in powerful positions, notibly those were Psychiatric doctors who began trying to find ways of "curing people" to their Eugenic agenda.
The cures they believed to work to cure psychological ailments included the use of beating patient's to try and get the patient to learn that if cured they wouldn't be beaten and scare tactics, the understanding was that you could potentially scare the instabilities out of the patient.
Other such experimental therapies included the use of hypnotic regression therapy and the use of psychotropic lighting effects.
As it got closer to the war, those people in Mental institutes that suffered ailments due to natural deformaties were used for horific experiments to work out better methods of retracting information from people, or better ways to torture someone.
By the end of the Second World War, all the Nazi legacies (Projects and plans) became property of the Allieds, who then in turn 'might' have continued the research in one way or another.
Nowadays there are projects that doctors and scientists want to do, but the current state of the world doesn't permit them (Usually because of Religious Edicts)
Such projects are likely to be Stemcell research, Gene therapy, Cancer Treatment and a few dozen mental ailments to name a few.
Admittedly it's understandible why some projects exist, however the way they exist is wrong. For instance it's known that the state of the world and how technology has been used to enhance our daily lives, normal average people live without the full understanding of the dangers of using such technology. In fact the usual problem is that the large corporates that have made alot of money through selling such technology, did in their early pioneering stages cut the few corners of testing the equipment for side effects.
It's said that a singular mobile phone outputs microwaves when in use that can penetrate into a persons brain, the outcome of research towards this causing problems was found that it was hardly worth complaining about, however thats one mobile phone, but how many mobile phones now exist in our world in some form of use? Globally all those mobile phones tallied together is a problem and an expensive one to fix. (Especially since most people that are now use to them will not want to give them up like Cigarette smokers and cigarettes, in a form they are junkies hooked on them.)
It would have been possible to pull the plug perhaps in the embreotic stages, however business is business, and they won't stand in the way of progress, if progress is money.
However stating all of this takes me away from the main point that these particular technologies and others enduce different frequencies to flow throughout our known world, Frequency bombardment of cellular chains causes genetic alterations (like Obesity) and Cancerous mutations.
(
Cellphones may boost forces on biological tissue)
This is why some people would be looking at the usage of antenna arrays in conjunction with Gene therapy, however Gene therapy has had a constant bad press, since a number of testee subjects in the US have died from the experimental treatments. The treatments themselves can seem torturous to those undergoing them due to the fact that genetic alteration at the molecular level enduces a large amount of pain.
Admittedly it's my theory that such equipments in use for this, based upon the "corn circle" phenomona, originally I was going under the essence of electromagnetic manipulation used to cause the corn to bend, however the real method of getting the corn to bend is actual Gene therapy. Genetic manipulation of the corn through antenna arrays, admittedly operationing on a corn field is different from a human being but it would teach a group of people how to manipulate genes at a distance form the "Corn field" subject, however corn fields don't rive in agony at the pain inflicted.
Since such therapy is looking at becoming renound for it's deaths due to it being so experimental, it's very likely that it could very easily become illegal.
The usage of Antenna equipment can also be used for Cancer treatment through Global Radio Therapy, this could help prevent or even cure some forms of cancer from a continued low exposure of certain types of radiation. (Notibly breast cancer)
Mental ailments can be studied through the use of Pseudo-Telepathy, Since the communication within the brain is on a genetic level, and the system thats been devised can interact at a genetic level it's possible to map what a person is thinking into a neural network of parallel processing systems (Usually found at the antenna sites)
The main problem with such a system in a worldly use is the shear fact that having a number of people suffering different mental dilemma's all having their information mapped and dealt with at the number of processing stations, potentially gives way to "bleeds/Overflows" where an instance of thought that belongs to one individual could mistakenly be redirected to that of another.
This means that the psychological use of this equipment for the purpose of dealing with diseases and disorders is limited, however it is possible that a small number of individuals could be studied to learn about certain ailments if the equipment was to be used correctly, legally and most notibly publicly.
(It would be possible for smaller systems to perhaps be used in metal hospitals, however to deal with each individual one at a time it would mean considerable waiting lists.)
One other aspect about the current explaination of people perceiving 'probes' or 'Autopsies while still alive' and even 'Abductions' is the factor that the use of such equipment coupled with an understanding of hypnotism can create great methods of deception to hide what the actual reality was. Such usage might be to hide up the truth that the experiment is a bunch of scientists at a facility using mentioned equipment, or might actually be a study of how the human conscious mind tries to derive reasoning from the occurances a person has percieved.
There were even original studies as to what control hypnotism can create where the subject in their hypnotised state is commanded to perform certain acts like pushing a skewer through their skin and being told not to bleed. Some might believe this to be faked when theatrical hypnotism is performed, however there are certain sleep disorders where one sleeping victim has killed or beaten their partner while being asleep, when waking they don't even realise they have done whatever it is they did.
I'm not saying that all systems that use this result in someone being put to death just to prove the equipment works, but the suggestion is that a person could inflict alsorts of things upon themselves while in this state, that would then be perceived as "alien marks" upon their body.
(It's also noted that in one instance of a spy being killed in the UK some years ago using a Umbrella firing a small poison metal projectile, that the same sort of weapon could be used to imbed implants into victims for projects. The victim could think an alien implanted it (through hypnotism and the fact that the implant would show the victims location), but the reality would be that while they were going about their daily routine, someone shot them with the implant projectile.
The human body can sometimes block out plain to an extent if the speed at which a projectile or heated object can damage the nerve tissue fast than the tissue can output the pain reading. The only time those wounds hurt is if you see blood, then it's empathy that makes you realise the wound hurts.)
EMP, Mind control & Telepathy
Note: Dolphins do kill sharks, but it's not through a sonar blast. Dolphins bunt the sharks with the top of their nose on the sharks gills, damaging the gills of the shark stops the shark from being able to take oxygen out of water correctly and therefore drowns them.
I have seen it mentioned in a few places that dolphins were originally used in finding mines, although this practice I believe has stopped because of current technological advances. (Why kill a dolphin when you could get a small submarinal craft to dispose of a mine)
There was previous concern that a certain Navy doing HAARP testing for penetrating Sub hulls with High Frequency soundwaves had caused the death of a few dolphins in their testing, but this is because Dolphins and Whales like travelling in groups, so a Dolphin or two potentially tagged along with the test vessel and got in the way, which admittedly is an unfortunate accident that said Navy would have played down.
You have to imagine it like this, High Frequency can "Penetrate" some mass, however sometimes it can find itself making contact with how the mass is structured. In this case it was the Skull of the Dolphin which is specifically adapted to picking up sonar signals, since it's a preportion of the mechanism dolphins use to navigate and find food.
However a dolphins natural output is no where near the magnitude of the output of a Frequency system developed to penetrate multiple hulls. (since Submersibles and even ships have multiple hulls to deal with stress loads.)
This is also something that can be used to explain how it's possible to place a Sonar voice into someones head, using the very same technique that the dolphin uses. However instead of the individual outputting the sound to work out their relationship with the world, others can input what ever they want into their head.
Greys?
Personally I think if you have seen one then you've been lied to by someone, or by taking something. I think the mass hype of aliens has lasted since the 1938 broadcast of "War of the Worlds" (H.G.Wells, Read by Orson wells) aired, at that particular point it was made to sound like a factual representation of events and span the US into a formulated media frenzy hunting down what was reality or fiction.
It's as if certain individuals since that day have craved their '15 minutes of fame' (Andy Warhol) even if their names aren't directly tied to the events they portray.