Just place it upon the mass media and politicians. Have them register all commo equipment they purchase as well as have a 15 day waiting period (make it six months instead). Make sure they have to take about 300 hours of training in the responsible use of their mouths before they go shooting them off. If caught in a lie, fabrication, or spouting words that could result in the diminishment of Constitutional protections they get charged accordingly by zealous DAs.
Make sure there are hefty fees imposed for said registration. If they want to go full auto triple it.
That, and your subsequent post, sound like implementing regulations to be written by the Bureau of Free Speech Enforcement.