It's that they don't want to be centered in with clopping to the show. The stereotype for bronies is that they clop to the show not the porn. You're a clopper, but I highly doubt you've clopped to just the show, but the R34. *Think about it from out of the brony bubble, clopping to the show in general would appear to be creepy.*
I'm not a clopper, but I know what comes in the territory of being a brony. And sometimes, bronies don't like being blamed for things they don't do. And sometimes they hate cloppers for giving them a "bad rep". With or without cloppers ever existing, the strereotype will still stand. So I don't understand the hate. I've met cloppers and found them to be cool people. They told they were cloppers down the road and I never knew; wanna know why? Cause It doesn't change jack about the personality of the person.
Cloppers are just bronies.... Simply put, getting hate from places you are supposed to be getting loved and tolerated ain't right. I'll end with this, Should we kill all masturbators?? Should we kill all cloppers?? Pretty messed up don't you think.... *There is more I want to say, but I'm a horribly typer and I'm tired*
Pinkie Pie is best pony!