<p>In May 2013, retailer Nordstrom said that yes, it was sniffing customers' WiFi to track their movement through 17 US stores.</p><p>Nordstrom was collecting anonymised, aggregate information, a spokeswoman said at the time, and wasn't identifying personal information tied to a phone's owner.</p><p>Therefore, Nordstrom said, it wasn't using the WiFi data to market specific products at specific individuals.</p><p>Tracking customers and not using the data to target marketing and advertising might sound innocuous, but there are those who question the privacy ramifications as the technology begins to proliferate.</p><p><a href="http://nakedsecurity.sophos.com/2014/01/16/businesses-are-building-shopper-profiles-based-on-sniffing-phones-wifi/">Keep reading...</a></p>