A small transmitter built into the electric system of an environment, either stationary or potentially mobile, transmits a weak RF field capable of at least partially disabling a communication device in response to receiving a trigger signal. The trigger signal is generated by the electric system in response to the presence of one or more so-called "forbidden" conditions that require that the communication device be disabled. Disabling the communication device in this manner prevents the user from using the communication device under inappropriate conditions and thereby operates to greatly enhance public safety. Disabling the communication interface of the communication device may entail disabling all keypad functions of a cellular phone, for instance, disabling all but valid, predetermined emergency uses of the communication interface, or powering-down the communication device during the existence of the condition.