**Warning** This is a short post.
James Fallows had a contest on his Atlantic blog yesterday, asking readers if they could figure out the meaning of this sign:

It was taken in Ritan Park, the park I frequent. I had noticed it before, and as I found out from Fallows, was wrong about what it meant. Hint: it does not mean “No tearing at leaves/grass/ferns/green things” or similar, such as “Keep off grass.”