It isnt so much about the kid wearing the device as it as about the environment the kid is hanging around in. the idea of acoustic monitoring is a slippery slope, and is rife with zero days, also sounds like it could be dangerous to the wearer, to be somewhere, and have a government agent call up while a bunch of thugs are present, thugs who now know that kid has a monitor, that a] records a GPS track b] has a microphone that heard what they were saying c] has been recording everything for how long? d] the kids a rat, punish him!

If you get arrested and probated as a result of your friends instigations then you need new friends so the shunning may be good but the physical retaliation risk is another.