This document discusses how location data can reveal extensive personal information about individuals, including where they live, work, go for holidays or shopping, how they travel between locations, what types of events and activities they engage in, their social circles and status, and even potentially sensitive or illegal activities. It notes that location is obtained through services that require sharing location, opportunistically as part of services, or hidden through techniques like battery cookies and wardriving. The document questions who owns individuals' data, whether people truly understand what they are agreeing to when consenting to services, and whether the current model of exchanging privacy for services is sustainable.