Even when Headmaster Scrimgeour isn't standing directly in front of you in the Great Hall or during a Defence lesson, he still has managed to remind everyone of his presence. Every hour since the first day of classes, from the morning wake-up call to the calling of lights out, his gruffy voice booms from the school loudspeakers.

"All arriving and departing owl posts are to be checked for contraband and questionable subject matter."

Now that it is October, have the school rules been engrained in your mind yet? You had better be following them ... or else.