So they'll find a new way - timer after loss of signal, FRS radio, long-range cordless phones, IR sensors, etc. Worse comes to worse, they'll do it manually and

So they'll find a new way - timer after loss of signal, FRS radio, long-range cordless phones, IR sensors, etc. Worse comes to worse, they'll do it manually and blow themselves up in the process. This isn't the kind of problem that you can solve with technology - sure, you can make it more difficult, but the people who make these things do nothing else during a day but make IEDs; they'll find a new way to blow things up. Nothing encourages people to tinker with electronics like the perception that their country is being invaded and that they can fight back with bombs. So take control of their cell system (which, by the way, will do wonders for the perception that the US doesn't run the country) if you want, but don't expect that to change much. The way to beat IEDs is to make it so they don't want to set IEDs, or at least so that you've got enough people who don't want them set that they can report when others are.