Yawn... every time you use an Oyster card on the tube, every time you use a credit card, every time you use a debit card, every time you use a mobile phone, etc etc, you put your location on record never mind the traffic cameras, general CCTV nearly every where... lost battle. If you don't like your Apple/Android phone keeping tabs on you then turn it off... you'll lose a chunk of functionality from anything requiring location data but you'll be far less visible as long as you only ever use cash and probably make all your journeys underground via sewage tunnels...
