Stores Tracking Phones

In Forbes: Ways to opt of being tracked in a store using your Smartphone.   The obvious way is to turn off your Bluetooth and Wifi.   The tracking approach is getting more common, but few know it is going on.  " ... A number of companies have cropped up that are in the business of bringing online tracking techniques to the offline world. Rather than tracking your clicks and movements from site to site, they specialize in tracking your movement through the real world using that convenient tracking device that most people can’t live without: the mobile phone. Your phone can be turned into a homing device that lets retailers know how often you come in, how long you stay and, in some cases, where you walk in the store. ... "