Mine is not very good, but its the first that came to my mind
A guy was riding a bike, when he saw something written on a far off wall.
He went curiously to check out what it was.
In that procedure, he was fined $100 for wrong parking, $500 for jumping red light
The writing on the wall was: "The Guy who reads this is an Asshole"
He got irritated
so he wrote instead
"The guy who wrote this is an Asshole"
Muahahahaha