Technology & Society has touched on this a few times… RFID implants in people. WSJ has an update worth noting. My new car uses RFID chips to open doors and start the ignition. Having these “embedded” could be of value… but what if I buy a different car? The article lists electronic locks as one application, and also embedding medical history, contact information, etc. Your “RFID” constellation (credit cards, ID cards, keys, etc.) can identify you uniquely — for example as you enter a store, etc. So the ‘relationship’ between your RFID and the intended devices goes beyond that one-to-one application.
An ethical issue raised was that of consent associated with embedding RFID in a person who may not be able to provide consent, but would benefit from the ID potential, lock access (or denial), etc. An obvious example is tracking a dementia patient if they leave the facility. Of course we already put on wrist bands that are difficult to remove, and these might contain RFID or other locating devices.
What applications might cause you to embed a device under your skin? What concerns do you have about possible problems/issues?