Dry Humour, Or Bathroom Humour

Occasionally you see clever graffiti on the hand-driers in public washrooms.  For instance, in one of the men's rooms in the University of Waterloo Math building, someone had modified the drier instructions so that it read, "For a message from Bill Davis, press button." Davis was already long gone when I got to UW, so the message must have been pretty solidly scratched in. Or the custodians really hated Bill Davis.

But I think this display at the University of Guelph may have taken the hand-drier satire crown: