I don't recall ever seeing more then 1 pony picture outside of the megathread, and even that was only once or twice from what I've seen. Plus the fact that you should be able to ignore that as well if you're mature.
That's because you're ignorant to whatever the "haters" have to say. Also, I'm one of the few who ignores most of the stuff going on on this forum so your point is invalid.
Bronies started posting image spam of MLP in unrelated threads and
that is why the ABO came into existence. I find this perfectly normal for the most part, seeing it really was annoying, although they took it too far and had "wars" with the bronies. Stocking also took all of it way too seriously, it was actually kind of funny. Overall, it was a pretty pathetic thing to do of both parties.
Do you like, actually understand how many people are annoyed with this? There's even people who are willing to leave this forum just because of this. People who have come here for years. I bet it won't be long before most of the cool people are gone and the forums turn into a gay pony fest.