You can inject one under your skin and no one will ever notice, Using short-range Radio Frequency Identification (RFID) signals, it can transmit your identity as your pass through a security checkpoint or walk into a football stadium. it can help you buy groceries at wal-mart. in a worst-case scenario- of you are kidnapped in a foreign countty for example- it could save your life.
are you agree with this thing?
I think this is very dangerous if you're losing it or else it's violated to your personal privacies when your position is leaked.
So i think if you're using this technology for good purpose, it's already nothing to talk about but if it's using for bad purpose , it will be a disaster.