Alright, let us see how imaginative you guys and gals can get.
You are having a secret Santa gift exchange at your place of work. You happen to get the name of the one person that you absolutely hate. Now, On top of being a secret Santa if you knew that there would be no repercussions for giving a horrible gift(other then of course one that would do bodily harm) what would be the worst gift you could give the person? andddd go.
@TheNewsOwl alternatively, mylar envelope filled with mayonnaise that you set out in heat, preferably for an extended period of time.
Even worse: a gift membership to questionable clubs (ie NAMBLA), paid for with prepaid credit cards registered in their names from public wifi on a burner phone near your work. Have materials sent to the office.
An opaque airtight box filled with a rotting potato and glitter bomb
@TheNewsOwl the gift of scientology. Sign them up as interested, and purchase a dianetics book from their website.