I took a picture of this at a local strip mall.
Spoiler for Picture:
Notice that it says: "these activities are NOT permitted" and how the activities have "NO" in front of them.
Now it looks like it is saying "You will be prosecuted if you DO NOT do these things" or "You are allowed to do these things". Kind of like reverse psychology.
I may look dumb posting this, but I spent like 15 minutes wondering how this sign does not make sense.