One of my friends told me this theory about why we should stop trying to find life on other planets that he said he got from Stephen Hawking. Aparently, the universe is so obscenely big that odds are we aren't the only ones in it. And if aliens manage to find and reach us before we reach them, then they're clearly more technologically advance than us. And pretty much every encounter in human history between two civilizations with different levels of technology has ending in the more advance civilization killing/raping all the other guys and taking their stuff. So, if an entire civilization of alien critters has taken the trouble of finding us and traveling whatever absurd distance there is between us and them, they probably just want our resources. After all, it would probably be close to impossible for our two species to overcome the massive cultural/biological differences between us and actually comunicate, and even if we did there probably won't be anything we can tell them that they havn't already figured out for themselves. Does any of this sound plausible?