1. To display a static green arrow over the open TSA security lanes at Detroit Metro. I kid you not, at the main security checkpoint to get into Detroit Metro there are monitors over each metal detector. The ONLY thing those monitors ever display is a big green arrow pointing down. Oh, occasionally they display a blue screen with a Windows error notice.Classic. What was wrong with an electric switch and an actuator to move a physical sign (maybe even LED backlit) or swap it. No problems with updates or being open to abuse from computer virii/worms.
Reminds me of the time earlier this year on the way back home on the tube, when Bank underground station's status displays were all BSOD'dTags: [tagname]