The Imperius Curse, we are told, is one of the three unforgivable curses in the wizarding world and is used to control people. It’s used as a very important plot device in GoF and has received quite a bit of criticism for being used inconsistently. Now, I love and adore JKR (naturally, since I spend the time I do reading, praising and writing about her books) but she is only human. Furthermore, the Harry Potter series is her first published story, and even though it’s split into seven books, it’s still just one story. Everyone who’s ever tried to write fiction knows how hard it is to keep track of absolutely everything, so that some things in the series might not really add up; it isn’t weird at all.