What is the point of this thread? We take a poll, and if the majority votes that aliens exist, then that somehow makes it true? Belief or lack theirof in extraterrestrial existence is significant in any way, even given that we have no way to prove or disprove such and it has utterly no bearing on anything we will ever do unless we encounter such life?
Or is this just another "post your forgettable personal opinion so that people may form into ideological camps and throw inaccuracies at each other until we're all bored and forget about it entirely" thread? Unless there's some truly bizarre ulterior motive at work in the creation of this thread, it's just idle post-whoring.
That said, sure, aliens exist. I shoot at them with lasers all the time. They come to rape cattle and abduct hillbillies for joyrides, because the outer rim of the Galaxy is really just one big Alabama.