It wasn't a black widow but a mere daddy long legs. I killed it because I was too lazy to put it outside and I am an arachnophobic. (sorry for the misspelling) No, I had no right to kill it. Spiders are very useful.
Mammals are warm blooded, bigger therefore harder to kill and would suffer more. Also they are cuter. :shrug:
i think those type of spiders can actualy harm humans, but they cannot get through human skin. (if we are talking about the same spider)
humans tend to do alot of things due to lazyness though its common, but in my opinion i think respecting life even of little insects is good. rabbits are actualy very easy to kill, i have killed plenty before for food. they dont suffer if you brake there necks its over very fast. or you can always just cut the head right off with a good hunting knife.
i think it comes down to how cute the animal is alot of the time, also we care for mammals more than other animals, or creatures with human-like eyes. alot of western people dont like the idea of killing little cats and dogs, but in china they have no problem with it.
many people over here in the west wouldent actualy kill a lamb for food, but they have no problem eating the meat when its in the supermarket. its because we are pussies nowdays who cant deal with the moral issue face to face. i have killed hundreds of animals for food. you get used to it after a short time.
i think if you are willing to eat meat, you should also be willing to kill that animal yourself. im not saying farming is wrong or anything like that. but im saying atleast be able to go through with killing animals at some point in your life if your going to eat them. or its kind of cowardly, when you take a life of any sort it makes you respect living things. i know it might sound strange but its true. when you see an animal die by your hands it makes you realise what life is worth. the animal was running around living life and then you kill it, now its life has been taken away and it lays there lifeless infront of you.
i think people would respect living things more if they had to kill things that they think are cute. then it makes you think "hey even though spiders are not cute, they are still living things like that cute little rabbit, maybe i shouldent kill it for no reason".
it sounds funny though i admit, when you kill animals you like, it makes you not want to kill animals without need.
peace.