I Spied - the Twitter troll of Australian Intelligence - This week we take a long, hard look at power and pitfalls of social media - how intelligence services use it to gather information, how extremist organisations use it to recruit members, how terrorists use it to plan and carry out attacks. We examine how everything you post - from selfies to Fitbit data -  reveals far more than you think, and David talks about how a single incorrect keystroke on the ASIO internal messaging system led him into a romantic tryst with a real-life Bond girl.