I'm pretty sure stuff like JEW, Fallout Boy and Panic at the disco should not be grouped with rock such as Korn, Tool, etc... it's just insulting IMO.
Put it in the POP section or if you need to, call it POP ROCK or GLAMOUR ROCK, but don't throw it in with the entire Rock group. Panic couldn't hold ISHT against a Tool concert, or SOAD concert. Even though I like that "I write sins not tragedies" song, I would never put these 2 into the same iTunes folders together.