Disney People Tracking

Have followed this since a visit to Labs a number of years ago.  Tests have been underway since then, but now they appear to be pushing it ahead more generally. Disney bets big on visitor-tracking technology- MSN Money  Molding experience can start with understand issues with current engagement and experience.  It can also add to security aspects, like knowing where your kids are. But also adds issues with privacy.   Now if there would be an easy way to add an App to a phone and use the visitor's own device?