Someone that knew how to operate those signs just had a little fun late one night. Well done prankster.
If you're ever traveling down old 37 in Southern Monroe County by the Starlight drive-in, pay attention to the sign out front. At least once per year someone sneaks out at night and rearranges the letters to form a funny or vulgar message. I can't type what the latest message said, but I got a good chuckle as I drove by.
We have those big, programmable, light boards at work to keep manufacturing updated on how many cycle the machines have run, quality data, etc. They're basically great big computer monitors. Well, somebody on night shift thought it would be funny to reprogram them with something derogatory towards the plant manager. Needless to say, he didn't think it was funny.