The January issue of Scientific American has an article entitled "RFID: The Promise and Peril of Talkative Chips." Merchandisers use the chips to track their goods from factories to stores, but there is nothing to stop the same sort of technology from being abused, i.e. tracking people by the tags in their shirts, pants, etc. One company actually abandoned plans to implement such a system because of pressure by watchdog organizations....
Also...It wouldn't surprise me if the same people who are worried about radiation from cell phones, are the same people who regularly sunbathe.
