Secret Santa?
This was a prank in which I was the first ever victim at my company. It was just before Christmas and the company sent out an email to sign up for Secret Santa. For those who don't know, each person who signs up puts their name in a hat. Each person then pick a name from the hat and purchases small/cheap gifts for that person for a determined $ limit. This was a two week Secret Santa with a $15 limit. Being very new to the company and not really knowing anyone, I opted to skip Secret Santa for my first year. Well, to my surprise I started getting little gifts on my desk. I confirmed with the coordinator that I was not included and though someone was just putting the gifts on the wrong desk. The gifts continued and got more elaborate and weird (Frisbee, a Dawson' Creek paperback, and the ugliest Christmas decors were only a few of the crazy gifts I received). When it came time for revealing the Secret Santas it turned out that six people got together and decided to play this joke on me. In total there were about 25 gifts. For the next five years the person who was tricked the year before got to pick the next victim (only new employees hired after the prior Christmas would do). The same gifts were passed on along with any crazy new ones. Each year that person contacted the coordinator letting them know they were getting gifts even though they hadn't signed up.