"Plane Mode" for wireless gadgets

The Consumer Electronics Association has announced a project to make it easy to tell whether a device's (such as a smartphone) wireless capabilities are turned off so other functions can be used on airplanes. While we sort of see the problem (but with some airlines adding WiFi and the like, our preferred solution would just be to let people use their gear and shield the airplane's electronics or something), we don't think the solution needs to be all that complicated. Most devices have at least on LED these days. Just have a fixed color that turns on when the device is in "no broadcast" mode. Seems simple enough.