"Drtees, Thank you for the comment. I agree the exemption you cite is disturbing in that it offers another back door manner by which authorities - particularly CSIS - might be able to surveillance Canadians without a warrant. However I doubt that any data gathered in the manner you suggest could be used in court. So as a tool of law enforcement it is more limited. But I agree the implications of exemption 34, I which I'm familiar, are ultimately quite frightening." - David Eaves