On one particualar anniversary of an event in the life of Che Guavara, the young socialists in Sydney had a spate of painting "Che Lives" on walls everywhere. A fruiterer got some paint and changed the one by his shop to read "Cheap Olives".

On a toilet wall in a pub in Redfern, one that made me laugh for no very good reason was
Fuck
Shit
Bum
Piss
Wank

On the toilet wall in the loo by the physics building at Sudney Uni
Work=Fd
F=ma
Therefore work is mad