It's a CA thing. It's posted all over the place, parking garages, restaurants, my old apartment complex had it, just about anything can have that warning on it. Even Stone glassware has it. http://stonecompanystore.com/store/product/1958/ABA-Pint-Glass-Bastard-Bones/ It is generally ignored here in CA, and is an unintended consequence of a crappy law.
