What I don't think people realize R34 ponies is that EVERYTHING is R34'd. Pretty much every fanbase and form of media has some sort of R34 connection. Look at Pokemon, for example. I'm sure Pokemon has much more inappropriate content then MLP, and yet people do not connect that content with the show/games. Trying to label the cloppers as the source of the problem is incorrect and attempting to snuff out it's existence is hypocritical to what Friendship is Magic has taught most of us: Love and Tolerate.
I personally believe that bronies have simply become mis-represented. There was a time when people just linked bronies to people on /co/ and occasionally other 4chan boards who admired the cartoon, the animation, and such. Ask yourself what the term "Brony" means now. Are they just simple fans of the show; are they die-hard enthusiasts who owns mountains of merchandise and whose life revolves around the show; or are we all on a bandwagon, just following the newest fad? Each person I have asked that question to has given me a different answer. Some people don't label themselves as bronies because they don't want to be linked to the die-hard enthusiast. We even gender-split our fanbase, and some of us don't want to even follow through with that! Announcing yourself as a brony is the near-equivalent of coming out as a homosexual now to some people.
In conclusion, Friendship is Magic becoming a popular "meme" is the worst thing that happened to the fanbase, we have lost our individuality.