Fill their desk drawers full of styrofoam peanuts.
Cover anything that will sit still with post-it notes.
Hang paper clip chains across the top of their office.
Create a masking tape outline of a body on the floor and section off the entrance with yellow crime scene tape. (e-bay)
My personal favorite... Take over making the coffee.... use decaf. Give it 2 weeks then make a strong pot of espresso.
