In my school you were forced to study the Holocaust in history. Each year, every student was issued a book called "The Jewish Journey," or something equally catchy. The books were ancient, and all had some degree of graffiti inside. It wasn't until my year though, that a fully co-ordinated graffiti strike was arranged, and each picture in every book was given the same caption or speechbubble.
e.g A dead malnourished Jew says, obviously, "Give me a sandwich." A trainload of unfortunates on their way to a death camp sing, "We're all going on a summer holiday."
It wasn't until Mark emptied out his pencil case, put it on top of Johnny's head and called him a "Dirty skullcap wearing kyke," that it was brought up in assembly. And Mark was suspended. Ah... days. Those were them.