In my completely ignorant and stupid opinion, those kinds of bronies aren't bronies. They call themselves bronies, but if they project negativity, they don't uphold the values that we have given ourselves. Being a brony is about more than the show (although that's a big part) it's about upholding to the values said show represents. To some extent, it's also about gender roles for some people. That's fine with me.
The big thing is the people who take this too far. This is something i'd like to lay down, and have been meaning to for a while.
We aren't a revolution. So you like a show for six year old girls openly, don't be an arse about it We aren't a cult. Being obsessive about it makes you seem like a weirdo. Not every possible reference is actually a reference. We aren't some kind of underground society. We're just a group of people with similar interests, which just so happen to involve a show for six year-olds of the opposite sex. We don't need to express our love for the show absolutely everywhere. Doing that is obnoxious, and is part of the reason we've been antagonized so much. Express your love for MLP here and places like here, not on something completely fucking irrelevant. Now, i'm not including profile pictures. Those are fine with me. I guess the main point that i'm trying to make is The fact that we express our interests so openly makes people dislike us because it's pretty obnoxious. I like the show, that's fine. I know some of you might not agree with the above, but Bronies in general are a really controversial idea. Spamming the fact that you like a kid's show makes you seem weird, not cool.
Well, apparently MLP makes my Ranty side go on the fritz. I'm ususally not this serious about anything whatsoever. Whatever, I guess it's just the mojo. BY NO MEANS DOES THE ABOVE MEAN I DON'T LIKE THE BRONY COMMUNITY. I AM STILL AN ACTIVE MEMBER AND LOVE YOU GUYS TO PEICES. There. Rant over. On your way.
EDIT: I just remembered a good analogy for any fandom in the public opinion. "A fart is louder than a chorus of angels." It means that no matter how many "Angels" are in a group, if someone's being really fucking obnoxious, people are only going to pay attention to them.
Sorry for the cursing, but it's kind of necessary to get my point across.