Crutches are much more obstructive, though.
May I ask why are you going to be bringing a cane that doubles as a club? Get a sword cane instead
I can't exactly bring a sharp object to school, and I wouldn't really want that much of a chance to kill/maim someone. With a club, I would have to worry less about actually killing someone, when I can just break a leg or arm and be over with it.