The people who use these devices fall under two broad categories: those who operate within the law and those who operate outside of it. In the former case, any jamming can be solved by a call to the FCC to the effect of: "Someone has been operating a jammer near our office. We think it might be a van parked nearby with the license plate 123456." In the latter case, any jamming could mean that the authorities have caught on to them and that they should start destroying all physical evidence. The drive would serve as a canary, so to speak.
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The people who use these devices fall under two broad categories: those who operate within the law and those who operate outside of it. In the former case, any jamming can be solved by a call to the FCC to the effect of: "Someone has been operating a jammer near our office. We think it might be a van parked nearby with the license plate 123456." In the latter case, any jamming could mean that the authorities have caught on to them and that they should start destroying all physical evidence. The drive would serve as a canary, so to speak.