Well, fine, maybe Professor Carrow could'of done something else, but the point is that it was his lesson and his desicion decision. If it weren't allowed, don't you think the Headmistress would've said? Or the prefects?

Stop whinging about it. I mean, years ago they used to string students up by their toenails. I know people who use it instead of a spanking - I know Mum says that no one needs to be Cruciated twice for the same mistake.