One weekend morning in a town where I used to live, I went into the local grocery store. On the bulletin board outside the door was a card advertising the Ku Klux Klan.
I took down the card, and was about halfway tempted to call the number and talk with them.
I went back to the grocery store that afternoon. A copy of the same card had been re-posted.
I thought it was probably done by someone who worked at the store.