Thanks so much for answering that. I did see that it was labelled "on/off" but wasn't sure what it switched. The best guess I could come up with was to completely override the cameras, like a factory set feature for corporate/gov purchases. Your answer makes much more sense.
Does anyone know what the internal on/off switch does on the motherboard? Right next to the battery connector. How can you see that in a tear down and not mention it?