Funny thing is that I cleared my prank with Peter Sachs because he was a bit of a stick-in-the-mud, but he told me to go for it and he thought it was hilarious.
I didn't clear it with Jim Collinsworth because he was a bit of a jokester himself so I (incorrectly) assumed he'd have no problem with it.
I had a CTO tell me to fill a cubicle with quick drying cement after a prank went wrong but I stalled him long enough to cool down. I knew the building management company would have been furious had I followed orders. The CSO had pranked the CTO with a dongle that opens excel and slowly types "I know what you were doing..."
next time recommend using expanding insulation foam instead, but first cover everything with big sheets of plastic. the victim will still have a hell of a time getting rid of the foam. that stuff hardens...