A bit of context, these bins tracked wifi enabled devices as they passed by for various targeted marketing things. <a href="http://crave.cnet.co.uk/mobiles/londons-smart-bins-track-4m-phones-a-week-over-wi-fi-50011958/" rel="nofollow">http://crave.cnet.co.uk/mobiles/londons-smart-bins-track-4m-...</a>