[It has since been pointed out to me that Section 7 of the 1920 Act was used against "Van Harleem" because it was not known what information he was handling or even who he really was. Another reader thought that the use of anti-terrorism legislation was reasonable because Snowden almost certainly copied information of value to terrorists (as well as to others). Meanwhile the split of public opinion quoted in today's Guardian article on the legal controversy is interesting: including support for the destruction of their hard discs - would you trust their ability to keep secure that which they decide not to publish because it was not in the public interest, let alone allow journalists to make such decisions?].
Meanwhile the spread of low cost, mass market, encryption tools, from Scrambls to Silent Circle threatens to also destroy the business models of many of those who are so ensthusiastic about Big Data . We live in "interesting times".