Correction to last post. That should be "transmitter signature recognition". Some of the newer receivers use a DSP circuit , digital signal processing, that will allow it to learn to respond only to your transmitter and reject signals from other transmitters on the same channel. Much better than so called "fail safe". You might want to take a look at the "Berg" receivers. They're not any more expensive and if more folks used them the big three or four major manufacturers would probably take steps to develop units with some form of interference rejection without loss of control.