It gets better:
Malls halt plans to track consumer movement via cell phones
"The technology, Footpath, uses tracking devices throughout a mall to record shopper movement by triangulating the signals of their cell phones. The collected data are then run through analytics and the results given to retailers. [i]Personal information such as cell phone numbers and the names or address of phone owners are not recorded.[i]"
That last sentance is bunk.
Any device that transmits a unique signature(i.e. processor i.d.) can be read, saved, interpolated, and used for other purposes.
How is anyone to know?