People that absolutely hate bands beyond (artistic) dislike are retarded anyway.
I've scorned and ridiculed the hipster/emo/goth/metal crowd on multiple occasions, but I don't hate the music.
Nickelback, for all its generic blandness (although the first two albums were okay); Justin Bieber, for all its corporate cynicism, they are people making money. People buy their shit, and therefore there are people who like it.
You can't argue about taste, but you can argue about the merits of something popular. If people like what you do, you're doing something right.
But let me turn on my rosy-tinted glasses of nostalgia and days of yonder, and say that Nirvana gets a lot of flack. Certainly, it's not technical, but it was never ment to be judged on technical merits.