Like Catholic schools needed more negative publicity

I've known a lot of older Catholics who have bad memories of vicious nuns with knuckle-rapping rulers and such, although the few nuns I've ever met seem like really kindly sorts. I've never been to a Catholic school, but I had teachers like this one in my public school. Still, this will only serve to reinforce the stereotype. Bad teacher! Bad! No apple! (Unless there's a razor blade inside.)