I'm a huge fan myself (maybe even a little "rabid", I do collect ponymerch), but I'm not violent. I did get a little mad over the Derpy controversy of 2012, but I wasn't sending death threats to anyone. I hate R34 and gory pony art, and I actually grew up on G3, so I'm not bashing it, I just would not watch it by choice.
I do follow the rule of "love and tolerance". If somebody at school tells me that ponies suck or that I suck for liking ponies, I just say, "That's your opinion, dude. You have yours and I have mine." I don't try to convert every hater I see (because my school has a brony to hater ratio of 50:905, roughly).
Well I have the first 3 seasons on the PS3, those McDonalds figures, because eh I haven't had a Happy Meal since the late 90s and they can make for some interesting props, and maybe repellent I guess. As for the fandom, well I can't really comment much on it since I'm barely involved in it though I'm aware of the crazies. We have a bunch of them in the Transformers fan base; whether its with G1, or the movies, or Prime, or basically every bloody thing that comes out. Either way there's nut jobs in just about any fandom and religion. *wink* *wink*