Next, the stalled cars had their windows opaqued with a cheap commercial compound used for etching glass, and slogans were painted on their doors. Some were long: THIS VEHICLE IS A DANGER TO LIFE AND LIMB. Many were short: IT STINKS! But the commonest of all was the universally known catchphrase: STOP, YOU'RE KILLING ME!
December A ROOST FOR CHICKENS - The Sheep Look Up (1972)