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“Covert police or government operations may require complete "blackout” conditions. Likewise, an airline operator or airport may cause the mobile device to enter into an “airplane” mode, wherein all electromagnetic emissions of significance are prevented, at least during flight, thereby more affirmatively preventing interference with aircraft communications or instrumentation and enhancing safety. Similarly, if a terrorist threat or other security breach is detected, the airport may disable at least a portion of the wireless communications within a terminal using a policy command, thereby potentially frustrating communications between individual terrorists or other criminals.“

Apple patent could remotely disable protesters’ phone cameras | ZDNet