IMO, it's a street gang mentality. Or, a flock of sheep taking orders from an alpha-male type of leader who holds some unnatural power over their puny minds.
These people feel the need to tell others how to live their lives, and I'd be willing to bet that 99.8% of these busybodies are huge hypocrites who take their kids to AHHHNULD movies where people get shot full of holes and s*** blows up everywhere you look, but to see a BOOBIE is the most unspeakable horror in history. These finger-pointers probably blame their own weaknesses on the media instead of looking in the mirror and working out whatever problem it is that causes them to feel like they have to save the world, even if the world doesn't want or need to be saved.
...other than THAT, though, they're great people doing very noble work.....