First up a NYT article 'New Technologies Give Government Ample Means to Track Suspects, Study Finds', which refer to a Harvard report due out today and is sharp retort to officialdom's frequent doom-laden statements:
Now, a study in which current and former intelligence officials participated concludes that the warning is wildly overblown, and that a raft of new technologies — like television sets with microphones and web-connected cars — are creating ample opportunities for the government to track suspects, many of them worrying.
Link to NYT:http://www.nytimes.com/2016/02/01/us...tudy-finds.htm

Link to report (37 pgs):https://cyber.law.harvard.edu/pubrel...ark_Debate.pdf