Costumers tracking

Well after reading the latest news from the times:

http://technology.timesonline.co.uk/tol/news/tech_and_web/article3945496.ece

It raised some concerns to me:

- If they detect were you are, they can correlate this data with the CCTV system, and also the shops can correlate your IMEI with you credit card, and so on. Data minig is really powerfull in this cases.
- If this technology is really deployable, don't hey have to at least inform users? So you can turn off your mobile to avoid being tracked.
- If this technology goes to the wrong hands, what would impede people of selective killing others? Something like Bruce Scnheier's idea on road side bombing triggered with RFID passports.

The thing is that, here in the UK people don't often carry their (RFID) passport arround, but for sure, everybody carry at least one mobile.

Really scaring.