Wouldn't it depend on what "the truth about UFO's" is?
What would the aliens' interest in earth be? Simple curiosity? A stopover on an interstellar route? An interstellar watering hole?
What if the aliens think of us as nothing more than exceedingly ugly, fetid, sweaty dolts, of no possible use whatsoever, and they wouldn't miss us at all if we were gone? However, it hardly seems a simple matter to send an exterminating armada across many light years of space. Perhaps they are simply unable to amass the numbers necessary to do away with us as (humanely?) as they would like. Yet. But soon, they plan to have perfected a quick, painless, euthanizing agent, and the means to distribute it over the planet quickly.
Perhaps our days are numbered. Perhaps that is the truth about UFO's. Perhaps aliens find us even less lovable, on the whole, than we find each other.
Think about it. Humans have committed genocide, against members of their own species. Humans have expended vast efforts to do away with members of their own species. Why should we expect better from aliens?
Mutherfuckers best get your heads outta your asses, stop fighting among yourselves, turn outward, and face the strange. Because it's out there. And it's coming for you.
