And that bizarre UFO-chasing, wicca casting weirdo becomes a 133. Patron Familiarity Humor related to patron familiarity is most effective in small-town or branch libraries where the insane, the profane, and the remains of gossip breed contempt. Discretion, through coding, is especially important with local patrons because small town people know each other's personal quirks intimately. The Town Drunk, the Town Gossip, the Local Intellectual Snob will be identifiable to all, so change their names to Hemingway, Mother Goose, and Webster. Then use them as main characters in stories, poems and songs.
Songs are especially effective.
Write twisted patron-bashing lyrics to popular show tune melodies. Then share them with your staff. True stupidity deserves the reward of laughter 2. Those who do stupid things rarely stay around long enough to hear you laughing. The lady who washed her chicken in the drinking fountain deserves to be laughed at loudly and obviously.