I'm a little green to the alien research field but sometimes I think a lot of the references to aliens is misdirection to keep people from thinking more along the lines of cryptoterrestrials. If the Earth is caverned out, and honeycombed with ancient and modern tunnel systems, or natural openings, or its more of a hollow Earth, then there's more space underground than the surface. There could be tons of societies and races right beneath us.

Well I've heard that the human military project holograms of reptilians so military abductees think its not the humans taking them. They cover themselves in nonhuman disguises.