A bus company newsletter (1945-1958) we have in the 'Chives runs a perky little cartoon character named Joe Green. Joe likes to give tips about driver safety. They start off pretty innocent: “Watch out for tykes on bikes!” or “Keep ‘em rolling, but not in the aisles!” But they get darker and darker in tone, until they are downright creepy. Especially if you read them in the perky, Joe Green voice.
They eventually changed Joe's look, but not his message of terror.