'Aliens' are already here. Just imagine yourself rocking up in 17th Century Japan in Nike's and trying to start a conversation with a Samurai. We can presume that they're uninterested in our resources because we're still here. Our resources would best be spent in re-greening our deserts. And it's not a question of intelligence, humans are corrupt and the corruption runs deep. It's a question of the soul. Life is sacred, interfere with it and you'll be answering to Shiva. Life, at it's base seeks to reproduce and nothing more. It's amazing how these academic halfwits don't bother to use Occam's Razor or at least run simulations to find what will happen when you create an AI. Insectoid intelligence, anyone? An intelligent mat of algae choking the oceans, perhaps?   My guess is they're on an intergalactic clean up mission. If you insist on interfering with technology, keep it clean, or we'll let it wipe you out before cleaning up the mess ourselves, mother fuckers. Portal closing. Ha ha ha.