I have written before about how much trouble I had using windows as an unattended server for an application -- in this case for the XBMC video system on my TV's around the house. No matter what I did, how many tweaks I made, how many websites I checked for advice, within a day or two some application or popup would take control of the screen and send my unattended application to the background. This would not be such much of a problem if it was just me using it, but with a non-tech-savvy family members trying to interact with the device with a TV remote, it was unacceptable. Eventually I switched to the Linux version of XBMC in a distribution call Openelec and I have had zero problems since.
I was reminded of all this at the San Diego airport. They have these big beautiful screens with flight and weather and travel information. But apparently they have problems making the windows popups go away as well (that's some sort of HP registration message in the window):
The most amazing example I have ever seen was on a giant, giant advertising screen on the front of a casino in Las Vegas, which had a huge windows popup covering whatever ads were supposed to be served up. I wish I had my camera but I was out jogging at the time.
Update: A reader sent me this, via gizmodo, from Cowboys stadium