ADD at the Library

I'm studying at our school's library. I needed to get away from the distractions of tv and the couch at my apartment. But after about an hour of being here, I remember why I hate studying at the library. Why can't people sit still? It can be one of a hundred things, but what really gets me is people who constantly shake their leg up and down, listen to headphones too loud, drum along to music with their pen or fingers, and other constant fidgeting. Just chill the f*** out, sit still, and read. Not too tough.