Catching up on how to lawfully intercept in the digital era

In one of my previous posts "A top level espionage case in Greece" I blogged about two cases of unlawful interception -- good old espionage practices in modern environment. What's also worth mentioning is the rush for lawful interception in the post 9/11 world, that is free spirits get detained for singing or being nerds, activities you can hardly datamine at the bottom line, and then again, so