From what i learnt, there are more than 2 ways to not let them bein' asshole:
1) DO NOT make videos against them (not just you'll get thousand of dislikes, but also their Attenction); 2) DO NOT talk with them, with some sort of "Tone" (like: "I don't like Bronies", they'll immediatly take it as "i need a hug"...unless they're reasonable, and i hope some of them are); 3) DO NOT leave bad (or something like that) comments on some of their videos (except the porn ones, i think) or in their Site, it makes it worse; 4) Please, DO NOT make a COMPARISON between MLP and Sonic, it's gonna be really terrible.
I'm neutral when it comes to MLP. I get a bit irritated with how popular it is, but I don't hate it. Nor do I like it. If I did, I wouldn't be like those rabid fans you see who bash your opinion if you don't like the show. They're giving themselves a bad stereotype.