To those who have read this book, was anyone else disturbed that Harry used an Unforgiveable curse? I don't see why he didn't get punished for it. Actually, I don't understand why Rowling put that in. I think it was over the top - those curses really are supposed to be unforgiveable, and I don't think it's fair to mark Harry with having used one and then to let him get away with it. Anyone else read it?