Georg Monbiot has written very elegantly on the dangers of implanting RFID chips in people. Here is an excerpt (full post here):
There are, in other words, plenty of legitimate uses for implanted chips. This is why they bother me. A technology whose widespread deployment, if attempted now, would be greeted with horror, will gradually become unremarkable. As this happens, its purpose will begin to creep.
At first the tags will be more widely used for workers with special security clearance. No one will be forced to wear one; no one will object. Then hospitals â?? and a few in the US are already doing this(7)- will start scanning their unconscious or incoherent patients to see whether or not they have a tag. Insurance companies might start to demand that vulnerable people are chipped.
The armed forces will discover that they are more useful than dog tags for identifying injured soldiers or for tracking troops who are lost or have been captured by the enemy. Prisons will soon come to the same conclusion. Then sweatshops in developing countries will begin to catch on. Already the overseers seek to control their workers to the second; determining when they clock on, when they visit the toilet, even the number of hand movements they perform. A chip makes all this easier. The workers will not be forced to have them, any more than they are forced to have sex with their bosses; but if they donâ??t accept the conditions, they donâ??t get the job. After that, it surely wonâ??t be long before asylum seekers are confronted with a similar choice: you donâ??t have to accept an implant, but if you refuse, you canâ??t stay in the country.