ever notice the same 3 or 4 people show up on all the Area 51 documentaries?

I've noticed this time and time again. most of the names don't stick in my mind, but I do remember seeing the guy who used to run ufomind.com (don't remember his name/too lazy to look) and the guy who calls himself Agent X. now, back in the day, I searched both of them on the internet, and found all sorts of nasty allegations against the two. something about the ufomind guy being a child molester and Agent X being a schizophrenic who only went by Agent X when he was off his meds. true or not, they don't come off like the most "expert" of people on television. are there really this few Area 51 experts around, or are they just there to make legitimate Area 51 researchers look like goofballs?