Not programming related, but an "office" prank
Way way way back in the day - my first job as a teenager in fast food.
A girl I worked with egg'd my car. I found out who it was (a friend of mine knew she was going to do it)
The next day; I got the approval of the manager and when she wasn't looking, sprayed her with Pam (a spray on butter for baking) and covered her in cinnamon sugar.
Harmless but if you don't want the repercussions, don't do it in the first place :)
Now a days; even simple pranks are a loss of production time and I'm not gonna be responsible for that. No place for it in a professional setting IMO.
(and thank god the car was a pos - had it been a nicer car, she'd have paid for the damages; egg sitting on car paint over night will remove the clear coat in no time.)