I'm not so worried about any potential aliens. If there are aliens out there somewhere, I don't consider it very likely that they'll be as insane as our culture. Robots, on the other hand, will be programmed in a way that implies the technological progressivism, so it'll be an essential part of any AI.
Also, aliens are likely to be made of flesh, and at he most would be scaly, so a 9mm shell or a broad head arrow will probably stop them. But robots made of almost entirely metal are another story.
Oh no, LOLCats invade all my threads!