A friend of mine was the IT manager for a small company. One of our co-workers was
constantly slacking off and playing computer games at work. My friend starting winnuking his PC every time the slacker would start a game. Eventually, he became convinced that his machine was broken!
I don't know if that qualifies as a prank.
A few years earlier, this same fellow configured some static routes in the firewall, so that if you tried to browse to a porn site the firewall would send you to a web page that said "GET BACK TO WORK." :lol:
Of course, this is the same ******* that set my Compaq's BIOS to Spanish, so I couldn't easily read it to set it back to English. d'oh!