Privacy implications are one of the most prevalent criticisms of Google Glass, but the makers behind one third-party application believe the most effective solution is to wear the device.
Watch Your Privacy, a browser add-on that works as part of the Layar augmented reality app for Google Glass, alerts the wearer to privacy threats by projecting green “safe” zones and red “unsafe” zones based on OpenStreetMap data of surveillance cameras and tracking technology in the vicinity.
You can read more about it here.
