"If you don't like it don't listen to it" from bad music fans annoys me soooo much. If it's a hit song, I might have no choice but to listen to it sometimes. And even if if I only hear it once, it bothers me that something so crappy even exists.
Agree 100% with Melissa. People have to have the freedom to express negative opinions. I want to say back to these people, "If you don't want see criticism of your favorite crappy band, don't read it."