When you watch these ads, the ads check you out

(AP) -- Watch an advertisement on a video screen in a mall, health club or grocery store and there's a slim - but growing - chance the ad is watching you too.

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<p><a href="http://www.physorg.com/news152544159.html">When you watch these ads, the ads check you out</a></p> <p>(AP) -- Watch an advertisement on a video screen in a mall, health club or grocery store and there's a slim - but growing - chance the ad is watching you too.</p>