Re: "...terrists will already be doing this..."
You know, I would have agreed with you until recently. But the Paris terrorists encrypted nothing much, apparently. And the San Bernardino killers posted on Facebook, though not their explicit plans.
It's odd. Perhaps we ascribe more cunning to the evildoers than they actually bother to use? Their messages are really needles in a large haystack, and it appears that the lack of ability on the part of Tha Lawr has more to do with their few successes than cleverness in using black-ops comms.
Anyway, that's off-topic. Now back to regularly-scheduled bashing of dimwitted pols.