Caution! Zombies! Ahead!!!

[Thorin]

Yeah, so don't leave your sign sitting by the side of the road with the access panel unlocked...

source: http://www.telegraph.co.uk/news/picturegalleries/pictures-of-the-year/6906216/Pictures-of-the-year-2009-funny.html?image=3

[Darren Dirt]

everybody grab your banjo...

[Lazybones]

From what I understand some of those signs are programmed via unencrypted IR. Some can be set with nothing more than a universal remote with the correct codes loaded.

[Mr. Analog]

That's freakin' awesome!