There was an entertaining lecture about it this (and other stuff) at the 30C3: http://media.ccc.de/browse/congress/2013/30C3_-_5604_-_en_-_saal_1_-_201312282300

There was an entertaining lecture about it this (and other stuff) at the 30C3: http://media.ccc.de/browse/congress/2013/30C3_-_5604_-_en_-_saal_1_-_201312282300_-_seeing_the_secret_state_six_landscapes_-_trevor_paglen.html http://media.ccc.de/browse/congress/2013/30C3_-_5604_-_en_-_...