"Spitting Prohibited"

As amazing as it may sound, "Spitting Prohibited" signs used to be a prominent feature in public buildings.

CHAPTER 1733
Expectoration
1733.01 SPITTING IN PUBLIC PLACES PROHIBITED.
No person shall spit upon the sidewalk of any street, alley or other public place, or upon the floor, walls or seats of any room, hall, office or other part of any tenement, hotel or lodging place, store, theater or other building or room which is used in common by the public.
(1969 Code Sec. 833.01)

If a sign used today is seen as silly in the future, we know it has done its job well.