do you think the aliens are allowed to be free of overt offensive aggression from humanity?
Benevolent ones just don't interact with us. Malevolent ones have such far superior technology, that when it comes to blows, they always would and do get the better of us, so it isn't in our advantage to be violent with them.
Only once to my knowledge when they were clearly breaking the treaty did we try to fight back, but it was pointless. Technology transfer stopped, and they continued the abductions at increased rate anyway. More of our military personnel died in the quarantine, and their activities were operationally curtailed very little.
Now? I don't know, I have to do more research, I'll get back to you. It seems things may have changed since the Columbia Disaster and the attempt to disband one of the Van Allen radiation belts between here and the moon. With out the removal of this belt, we need their assistance for any operations on the moon.
Removal
http://en.wikipedia.org/wiki/Van_Allen_radiation_belt
The belts are a hazard for artificial satellites and moderately dangerous for human beings, difficult and expensive to shield against.
There is a proposal by the late Robert L. Forward called HiVolt which may be a way to drain at least the inner belt to 1% of its natural level within a year. The proposal involves deploying highly electrically charged tethers in orbit. The idea is that the electrons would be deflected by the large electrostatic fields and intersect the atmosphere and harmlessly dissipate.[13]
Bear in mind, THEY want their presence here to be kept a secret as much as our governments want the presence to be kept a secret. If people find out they are the ones responsible for fomenting all the war, poverty, disease, hunger, lack of energy, etc. our populations will not be happy.
This is why warfare with them out in the open is not an option, and I believe NASA has been used to try to achieve things that could be achieved with the secret military space program much easier. I think the earth's nations are trying different strategies to through off their influence since that treaty was signed in the fifties.
In this video, you will see NASA's attempted mission with their tether. . . this I believe was an effort to take down this Van Allen radiation belt. This belt is in place to keep us OFF the moon. It is why we haven't been back, and why we aren't allowed on the moon. It is a base of operations for them. There is another radiation belt past the moon which keeps has hemmed in as well.
(I wouldn't necessarily buy the official reason for the tether, or why it broke, remember, the government and NASA lies about EVERYTHING, )
http://www.youtube.com/watch?v=As-wYmFYb3I
For two years now I have wondered WHY this particular mission should be swarmed, only last week did I discover the true nature of this mission quire by accident by reading about the Van Allen belts on Wikipedia and the word "tether" was in the last part about how to get rid of them. I have found out from other whistle blowers that indeed, those radiation belts have been put in place and maintained to keep us "locked" up in a "prison planet" as it were. So no, were aren't going to be violent with any other interplanetary race until the galactic community has deemed us spiritually evolved enough and mature enough to be released.
I should point out though, the in roughly 350 years, a war/incident between Earth, Mars, and the Moon has been seen in one time-line, and they are paying close attention. Apparently, and it has to do with energy/vibration and balance, things I don't understand real well yet, it does affect certain portions of the galaxy negatively. They aren't currently amused.