Banned because a sort of meme has taken over my school. It's called "nugging": most of the people at UA high carry their backpacks with them to all their classes, and people will "nug" other people by turning their backpacks inside-out and making them impossible to carry. Supposedly, you are only allowed to turn it back the right way if you "nug" somebody else.
I keep my backpack in my locker.