“The researchers discovered that an individual ad purchaser can, under certain circumstances, see when a person visits a predetermined sensitive location — a suspected rendezvous spot for an affair, the office of a company that a venture capitalist might be interested in or a hospital where someone might be receiving treatment — within 10 minutes of that person’s arrival. They were also able to track a person’s movements across the city during a morning commute by serving location-based ads to the target’s phone.”
Andrew: This is a scary and fascinating use of technology. Further, it is but a glimpse into the digital advertising underworld. Thumbs up to the team at the University of Washington for the impressive work.