This talk will discuss some of the dual uses for data uploaded into social media platforms. It covers that volume of private and compromising data including private photographs, comments and financial details that people showcase on their profiles. This can include specific biometric data from photographs and their movement history from geotagging. Emergent 'Extreme Analytics' data mining interfaces are enabling those using them to predict future movements and patterns for individuals. The line between 'open source' and expectation of privacy will be discussed and differing viewpoints discussed. This discussion will also include a Wikileaks release in which metadata identifying sources was not not removed prior to public release, raising significant ethical and moral questions for the whistle blowing website.