You can't control if you are in a place where wifi is turned on... The "wifi radar" doesn't need you to have a device with wifi on to "see" you - it "sees" YOU in the physical world. Your body blocking the signal.

Also, on the actual OP subject, a Nema Node is basically just a specific power socket... Wild that they can basically just install extra power outlets all over the city and then later go plug in an AI face tracker 5000 to every one of them with no further oversight just because "the outlet was already there"...