How is a criminal going to stay in business? The police just ask MS, Google, Facebook et al for the info and show it in court? (Of course they will need a court order to first ask)
Then again, it could be a cost saving exercise for police forces as they will only need half the number of coppers.
Just thought.....has any considered the human rights of the terrorist in this?
More to the point, has any considered my human rights to privacy?