What is being trashed is the attitude, not necessarily the opinion. The attitude, quite bluntly, is fucked up. I don't think you even understand why it's messed up either.
What you're doing is slamming a person/people for making an artistic decision to use vulgar lyrics & a certain sound design. And then going about trying to flood threads not even relevant to it because of a simple disagreement over that.
I'm willing to bet some of us who have posted don't even necessarily disagree with some of the sentiment you're expressing, me included (in fact, my roommate and I were talking about this just last night after hearing some songs on the radio & being disgusted at them).
This doesn't mean we're going to go out of our way to bother others who enjoy that music or anything like that. It's about tact & knowing what social boundaries in any given situation are there.
Another example is if I hated what someone did to something (let's say musically for posterity), and then died. I'm not going to use the opportunity to spout a ton of hate over what he/she did.
There are some things more important than art/entertainment out there to me, and I hope so to you as well.