The implantation of RFID chips is a scary thought.

We can be tracked and mapped by the greater powers as if we’re a proximity card used for building access or a ride on the PATH train.

Is it appropriate that our privacy no longer belongs to us?

How have we been changed by this manipulation of personal freedom in the name of security and convenience?

Does it bother you that RFID implantation in animals leads to cancer?

When the U.S. Food and Drug Administration approved implanting microchips in humans, the manufacturer said it would save lives, letting doctors scan the tiny transponders to access patients’ medical records almost instantly. The FDA found “reasonable assurance” the device was safe, and a sub-agency even called it one of 2005’s top “innovative technologies.”

But neither the company nor the regulators publicly mentioned this: A series of veterinary and toxicology studies, dating to the mid-1990s, stated that chip implants had “induced” malignant tumors in some lab mice and rats.

“The transponders were the cause of the tumors,” said Keith Johnson, a retired toxicologic pathologist, explaining in a phone interview the findings of a 1996 study he led at the Dow Chemical Co. in Midland, Mich.

With RFID chips in our passports, our travel cards, our pets and our brains — will there be anything left of us untracked?