In the cases of events, e.g. bombing a church, paramedics, firemen are easy targets/sitting ducks. Being able to block coordination of further attacks is important. The hidden channels is not to silence the propaganda. That will never happen. But communicating to a vast network of perpetrators that "I just saw the army driving to location ABC, therefore we do the round 2 attack in location XYZ".

I am never in favor of censorship. I am merely stating that I understand a potential use under these circumstances. I don't agree. I just undertand the reasoning.