#2 is my fav! (via 9 Very Specific Rules From Real Libraries | Mental Floss)

Library and literary miscellany from your pals at Library Journal.
(Maintained by Molly McArdle, Assistant Editor, LJ Reviews)
My favourite is #8: “Yes, we know that you are in Library School. Yes, we know that you know Dewey Decimal. Nonetheless....
Yeah, we could use a “do not chew on the headphone cords” at one of my libraries. >.>
Latex allergy.
This is bizarre.