When I was in Engineering School (UL Speed School) one of the students took a dump on one of the physics professor's desks. Left a spoon in it with a note (you can probably guess what the note said). It became know around school as "Planck's Prank". Never heard what if anything happened to the student. This would've been a better "prank" as the dump stunk up the whole wing of the building before someone cleaned it up. The only person that was "pranked" was probably the poor janitor.