"If the school was just werewolves, we might be able to do something about that, but." Something that would keep them from having to lock the wolves up during the full moon, without the risk that they'd run off into town and hurt someone. Since there are witches and vampires on campus, too, though -- well, maybe it's best for everyone if they just stay locked up. It wouldn't be fair to ask everyone else to stay in their rooms for a few nights, just to let one group have a little bit of freedom.