Recycling Bins Track Londoners via Wi-Fi

Targeted advertising is moving beyond the desktop to Internet-connected devices around the world. The latest example comes from Renew, which has developed "smart" recycling bins that detect passing smartphones' Wi-Fi signals, and could soon be used to serve ads to specific individuals. One hundred of the bins, which sported digital screens on which advertisers can buy space, were installed in London leading into the 2012 summer Olympics.