Thief who mugged Facebook PlayStation-seller busted thanks to location data

The victim had been trying to sell an old PlayStation 2 through Facebook, and was contacted by a potential purchaser who turned out to be the mugger. We offer some advice on making offline transactions with people you meet online.

Foursquare app tracks your location by default whenever your phone is on

Foursquare, makers of the popular app that lets you “check in” wherever you go, unveiled a new version this week that tracks your location even when the app is closed. With opt-in as the default, here’s how to opt-out. We show you how to opt out if you don’t want ad men and Foursquare to constantly know your whereabouts.