So the method you describe would be that they inject a random RFID chip then read it later, and maybe associate with face recognition for entry into a database? I was thinking the database entry would occur during injection.
Is there evidence yet that this can this be done in muscle and not just under the surface in the skin? I have seen the process done in Scotland for the night club entry ID and it seems the chip is injected sideways not directly into the muscle. These chips were much larger than what could feasibly by injected with stand flu needle though, yet I understand Fujitsu had prototype some dust particle sized chips 6 months back.