Malls Are Tracking Your Cell Phone

Malls in the U.S. have installed systems that track shoppers by their cell phones. Customer movement data is then shared with retailers in the mall.

http://arstechnica.com/business/news/2011/11/were-watching-malls-track-shoppers-cell-phone-signals-to-gather-marketing-data.ars

Although the official explanation of the system claims that the data is anonymous, there are many ways to attach names to the data, including use of face recognition software that malls and retailers also have installed.