I wish I could agree with you, unfortunately I've had very brief first hand experience in the matter.
They are not the demons people talk about either. Those are something else. I don't know exactly WHAT, but I do know that "demons" and "grey
aliens", in reality, are two separate kinds of life forms. They both exist.
No doubt that some, if not many cases, ARE hallucinations caused by some exotic form of mind control. In my case, I had proof (for a little while)
that these creatures were actually physical in nature.
I'm not gunna elaborate on the issue any more than this, though. I already have elaborated on it before, and quite honestly... if you do experience
this stuff, nowhere on the internet is an appropriate place for you to share this stuff.
Just because you're paranoid doesn't mean they're not watching you.