Hello, gigantic self-labeled "brony" here.
I think you're taking the actions of a small minority of the fandom and assuming they're the actions of all, and we are by no means the only fandom that does that, we're just really big, kind of popular right now, and we're into something that seems odd on the exterior.
Also, I'll be honest with ya, whenever something big comes up that makes us look bad I usually shrug or laugh it off because I find it hilarious that some people actually have so little to in their time that they resort to talking shit on a bunch of people who watch an odd TV show. What you think I'm gonna get upset by the words of Howard Stern or Fox news? HA! I ALREADY HATED THOSE GUYS! I don't care what they have to say, and anyone who's actually going to listen to them and think we're this eeeeeeevil subculture destroying America or something probably wasn't my friend to begin with.
Also, I don't really consider myself part of some some collective or big movement or whatever, I'm just some guy who watches a cartoon, and also enjoys fanfiction and fan art based on that cartoon, and isn't afraid to say so (I'm actually wearing a T-shirt right now).
I'm a guy who likes a show, nothing more, nothing less.