The only reason I would ever object to these videos is the fact that some of the livestreams and TF2 servers are pretty cool. But they are simply obnoxious nerds, not outstandingly repulsive obnoxious nerds.
As a moderate fan I wonder if the MLPFIM fandom has a higher degree of perversion than other fandoms or if all this shit is due to the size of it. Its 2012 and I'm no longer shocked by the fact that people develop fetishes towards cartoons.
It's easy, Cena: the more absurdly obsessive a show's fan-base, the more depraved the associated fan-works will be.
Do you remember Invader Zim? The fans were so obsessively crazy that their amazingly perverted (in the sense that it was a show aimed at little kids, FFS) crazy art and stories were so pervasive and disturbing that it played a role in getting the show cancelled.