If it can't be stopped, then the options are:
1. Go low-tech. Its worked for the jihadis in A-stan fairly well.
2. Spread disinformation over the phone.
3. Overload the system. Keep in mind that now with computers scanning for certain key words, you'll need to integrate a couple of those words into every boring mundane phone call you make.
And of course, even if it officially "stopped", it will continue just with a black budget and even less accountability, hidden in the beuracracy of Mordor on the Potomac.