[derefr]

It would be possible consentually--Google could design in a protocol whereby, say, getting in range of a certain recognized Bluetooth class turns off recording features until you leave.

[bergie]

Apple has a patent on disabling cameras in a given location:

http://www.zdnet.com/apple-patent-could-remotely-disable-pro...

[randallsquared]

...and then we'd have a real reason to root. ;)