Eh, music taste is completely subjective. If someone says they're the worst band ever, a response like "just because it doesn't appeal to you...." is just stupid, because DUH. Generally speaking, a band someone finds bad is one that doesn't appeal to them...you'd hope so, anyway.
I really, really despise this band. My friends, who share similar music taste with me, discovered them mid-to-late 2005, and told me I'd love them. I listened to about five songs, and hated each and every one of them. I think it's mainly the lead's voice...it just makes me want to do a Chopper. I don't find the music and melodies to be particularly inventive either. Oh, and I'm really not a fan of the song titles either. The length of them irritates me.
This is JUST.MY.OPINION. I'm not saying you should all feel this way, but yeah, I really don't like them. They are definitely one of the worst bands I've ever heard, and while I'm glad these guys have found success I don't understand it at all.