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How efficient was the identification of targets in ThinThread? It's a difficult balancing act in statistical data classification to achieve a high hit-rate (catch all the bad guys) AND a low false-alarm rate (don't single out any good guys as a bad guys).

ThinThread is described as being able to identify targets efficiently using automated filtering while at the same time considering the privacy of non-targets by encrypting the data concerning them or by not storing it in the first place. Would it be fair to still call ThinThread a tool of mass surveillance since the data of everyone is under surveillance?

Can you see any contours of a positive development for citizen's rights in the US and around the world in the future? What can the peoples of the world do to push for a more open and free society.

A question which is maybe not directly related but: What are the prospects for a reform of copyright in the EU so that copyrighted works are released to the public domain sooner than the current 70 years after the author's death?