You Know It's Trouble When Your 13 year old son says....
That's great! I wish I would have done that. I only put gum in the chair piping. I was involved in a practical joke at school where fart spray was *almost* involved. I encouraged my buddy not to use it since the kid's locker we were sabotaging was two away from my locker. We just used an old pair of my dad's shitty, holy underwear.
What's next -- itching powder in the soap decanter
I know a guy who used to pee in the soap despensers at school. Remember those ones that hung upside down with the yellow soap in them?