I hate the sort of practical jokes that simply humiliate the victim at very little cost. They really ought to involve time and effort on the part of the perpetrator.
My youth worker colleague Mark has had his office done over. Everything in the office, and I mean everything, has been wrapped in aluminium foil.
The walls, the desk, the paper, the cabinets, the chair, the computer, the odds and ends (of which there are many) - all wrapped. It is now a place of great beauty. An art installation indeed.
Visit if you can.