de Boise principle
If you can't capture and convict on a crime, move the definition of the crime closer to regular behaviour. Clearly the next step here is to extend the law and prosecute those who use encrypted comms as terrorists.
So many examples of this with everything from speeding (we enshrine the right not to self-incriminate but we made a crime of failing to disclose the driver) to nasty porn laws (rightly designed to protect victims but now covering cartoons and illustration... I'm guessing Rolf Harris proves the point).
Strangely such ambiguous and wide-ranging extensions of laws rarely impact the ruling elite (no general "financial manipulation" law?) and are only applied to the masses.