Ancient Aliens and such are fun to watch...to me, it's like reading far-fetched fiction.
It's the same with other alien stuff; you have the "Grays" and the "Reptilians" and all sorts of far-fetched stuff presented as fact but seem to me to come out of people's nightmares or something.
As for Hoagland, if he's the one who says that there are structures on the Moon that the astronauts saw but are hiding from the rest of us, he's a nutjob. Utterly.
Yep, exactly the same as SF. That's what I get out of it - the only difference between, say, The X Files and a decently-written one of these is that The X Files acknowledges it's fiction for entertainment purposes.