RFID "Kill Switch" from Philips

In response to the Benetton Privacy flap, Philips says it will add a kill switch to its RFID tags.

This is representative of how many identity technologies will evolve. First, a technical problem will be solved, then the privacy implications will get thought about, then a technical change to deal with the privacy problems will occur so the technology can deploy. You can expect to see this "cycle" in many places as identity starts to actually deploy. Further, expect the privacy "fix" itself to evolve over time to become more granular and refined.