Spotted by a driver in Dallas last night.
Wait for it…
Can you see it?
BAM! POOP!
The next morning:
Found at: http://forums.offtopic.com/showthread.php?t=4726427
Three from Austin last year:
These signs have keypads behind them, and programming the message is as simple as entering the password, usually left to “abcd” by default, and entering the message of your choosing.
[I do not condone it.]