Awesome idea, Professor--but no, really, you'd better not. Think about it: it's not the sort of thing a man can ignore. Especially a mean snake of a man like the git. And once it dawns on him that someone has hexed him inside the castle--much less a castle protected by the Fidelius charm--he won't rest until he finds out who did it.

Still...we can't blame you for toying with the idea. The mental picture is just delightful.