Duct Tape
I came into work this morning to find that my cube had been completely covered in duct tape. It was well done and mad props to the perpetrator. Unfortunately, he didn't cover his tracks very well and left a receipt with his last name on it in one of the adjacent cube trash cans.
I was planning on leaving it up for a day, but the fumes coming off of the six or so rolls of duct tape used were giving a few of us headaches, so we took it down before lunch.