The importance of *cryptographic sound* currency has never been more important : http://www.coindesk.com/startup-sabr-io-could-have-caught-silk-road-founder-in-days/
This is not about "identifying illegal activity on blockchains", this is about "tracking everything you do on a opaque blockchain".

Tweet of the morning, could not have said it better!
https://twitter.com/SDCoin/status/631692472419254272