I think the thing that bugs me the most is the girls who go to shows with they boyfriend and they are towards the front but all the do is stand there, and don't sing along. I feel, that if you are going to be in the front move around or get out so other people who want to move around can.
I also don't like it when girls act like a concert is a fashion show, and get all dressed up in heels, and skirts, or the girls who try and act "scene."