Looks more to me like the 3-letter agencies have decided to BREAK THE LAW.
Its an interesting debate. What law has been broken?
I'm pretty sure that with the Patriot Act at its back the FBI can justify the actions they've taken against peoples committing crimes in the US. There will be sufficient wriggle room in there for a good lawyer to argue their case. What is needed is a ruling. Something that's not been tested in court yet. The various Snowden revelations won't see their day in court due to the nature of the material released. A paedophile case would see court which would help determine the exact reach of the law.
The law is not, except in simple cases, a black and white thing. There are generally arguments around specific points and its the judgements around these that determine what is and is not legal.