Dreams of Mischief: Hand Sanitizer

You know the hand sanitizer dispensers that can be found in public places (saw some at the mall today.) Wouldn't it be funny to put soap in there instead of hand sanitizer? I can just imagine watching people rubbing soap in their hands and the confused looks on their faces when their hands end up sticky instead of sanitized. I would never actually do this (I think), but it sure is fun to think about.