At Ma Bell we didn't wait for April 1. One time they moved a not so popular supervisor's desk into the men's room. They took a VW bug, drove threaded rods thru the doors screwed nuts on, bent them over and then did something so they couldn't be removed (that guy was truly beloved, this was legendary and b4 my time, so I'm not sure what he did to make himself so loved), another loved trick was taking peanut butter and coffee grounds and sculpting dog turds out of it and leaving it in drawers. Then there was the dead fish over the 3 day weekend in the guy's desk drawers. It could get pretty mean around the offices if you weren't liked. They toothpicked one guys office lock so many times he got a magnetic lock.