I used to work in an office, providing phone tech support. It was a fun place, but crushingly bureaucratic. There were all these signs EVERYWHERE about what you could and could not do (e.g. DO NOT give such and such phone number out; Clean up your station after you leave). No one individual really had the authority to hang stuff up. So every now and then I'd make a drawing and hang it up among the shift schedules, and no one would take it down. It wasn't anyone's job to take stuff down. It became a contest with myself to see how outrageous I could make the drawing without it being removed.
This drawing was inspired by this and it lasted a little over two weeks.