UFO's and Aliens?

What if we have it backwards, what if we are the Aliens and they are the Natives? Maybe we was some sub species on another planet. Maybe we was an experiment that went terribly wrong, considered dirty, diseased, nasty creatures and they used the earth as a dumping ground. There are other possibilities of how we got here. If that is the case I would imagine the Natives have had about all they can take of us. They are studying recent documents that bring up the possibility of machines far advanced than anything we have that have the ability to cover distances in in seconds that takes our machines days. They bring up the idea of under water colonies. With the numbers of galaxies and planets out there it's hard to believe that we are a freak accident and are the only life that exists. What are your thoughts?