It's trivial to associate people with CCTV ... 1. Point a camera down a narrow traffic area -- like each door to the mall. 2. Capture their cell signal a

It's trivial to associate people with CCTV ... 1. Point a camera down a narrow traffic area -- like each door to the mall. 2. Capture their cell signal at the entrance. 3. Correlate using face-tracking. 4. Prune errors by tracking exits and entrances. Now you have a pretty good idea of which face has which phone, for that visit and all future visits to anywhere the mall sells their tracking database to.