What the hell is this thread about anyway? Isnt it pretty obvious that this forum is for talking about music, which is going to sometimes involve expressing opinions of it?
Theres nothing wrong with making judgements on a person by the music they listen to. People do the same based on how people dress, how they talk, and how they act. Personally, i see nothing wrong with considering a taste for crappy pop music as a sign of immaturity.
There is no end to the "different tastes" argument. Okay, so theres nothing wrong with liking good charlottle, that doesnt make you a immature child, its just different tastes. Theres nothing wrong with sleeping with your sister, that doesnt make you a sicko, its just different tastes. Theres nothing with wandering around the park dressed in a tutu and a collander, it doesnt make you insane, its just different tastes.