The RFID chips implanted in animals are only able to return a code number when closely scanned. There’s no way to change the data on the chip.
Would it be possible to create a chip implanted in a person that could collect all sorts of information throughout the person’s life? I mean, sure, that could happen.
The problem is, how does the implanted chip collect information? Pet RFID chips don’t, as I said they only contain a code number, which is tied to a database that contains the contact information about the owner. Your vet doesn’t program the chip with your pet’s name and your phone number and address. The chip comes with a number. Your name and address is added to a database and so, when someone looks up that number they find your name. The RFID chip doesn’t contain the metadata, any more than your old AT&T phone contained your name and address. Yes, someone who knew your phone number could look up your name and address in a reverse phone book, but only because that data had been collected and compiled already.
And of course, the RFID chip is passive and can’t return data unless powered by the scanner.
So your proposed invention would have to include a cell phone that routinely calls out to the cell network, retrieves the geolocation data, and stores it on the chip. But why do that? Why not store the geolocation log remotely at the NSA? It makes a lot more sense, that way the Men In Black don’t have to ping your chip to get your data. But the problem is the power source for the chip. How fast does your cell phone battery wear down? Well, this chip has to locate itself every X time period. How many calls can it make before the battery–which would have to be very very small, since we’re implanting this inside an infant’s skull–wears down? What, you’re going to mandate everyone sleep next to a wireless charging station?
Seems like this nightmarish chip would be pretty easy to defeat, just encase your head in aluminum foil to create a faraday cage so the battery can’t recharge and the radio can’t connect to the cell network. And then the Men In Black will have no idea where you are. They’ll be powerless. You’d be like a superhero who can move unseen.