It's a rather disgusting idea--sort of the modern equivalent of the Nazi concentration camp tattoo.
Several years ago I heard a story about a Chinese company who decided to make a big splash in the computer peripheral manufacturing business by making some Network Interface Boards, NICS to those in the know. One of the features of a NIC is the fact that it has a unique number that is broadcast with every message emanating from the computer in which the card is installed. It is that unique number that enables the routers on the network to send a message back to your machine. As things worked out the manufacturer decided to cut some corners in the way they made the cards.
The Chinese decided to make their card such that each would have the same number. Their marketing success was short lived.
Perhaps someone who wants to mess with the system could arrange for the same company to make up a few hundred thousand of these implant chips. That way we can all be truly equal. Same birth date, same sex, same name and the list goes on forever. Being somewhat of a brain surgeon, I bet we could teach any boy scout how to remove and replace one of these things in a single afternoon.
Have fun, I’m happy to see you posting again.