In Carolyn Hax, the topic of an implanted chip in a baby, that shows up as a dot on a smartwatch, was raised. Do they have such things?
RFID requires a transceiver within a few feet, right?
So what would be used? Wouldn't it have to have a battery, that needs replacing fairly often?
If not for babies, what about for trump? Does he have something embedded in case he's slugnapped? How would they find him.
If there's a transmitter, can't the slugnappers find it first and remove it?