jfruh writes: "Call it Google Analytics for physical storefronts: if you've got a phone with wi-fi, stores can detect your MAC address and track your comings and goings, determining which aisles you go to and whether you're a repeat customer. The creator of one of the most popular tracking software packages says that the addresses are hashed and not personally identifiable, but it might make you think twice about leaving your phone on when you head to the mall."
This is the theory that Jack built.
This is the flaw that lay in the theory that Jack built.
This is the palpable verbal haze that hid the flaw that lay in...