obviously very short-range but :

perhaps we will imitate the behaviour of teenagers who run out of credit on their mobiles : take a photo of a hand-written message and send it across the room by bluetooth.

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}

Yes, they can shut down nodes if the operators agree. But most operators will bring in mobile nodes to cope with data traffic at big events. It's already done at stadia events. Getting a bigger business all the time. They are not going to shut down income flow if it hurts their business - unless forced to. And I would assume that, if this kind of aggregating video streaming takes off, then it might be well established by the time riotous events evolve into mass violence. To switch off connections at that point would be like switching off the population's electricity. T'ain't gonna happen. Or if it does it'll be the government turning out the lights before leaving for a country that'll take them.

You can't be me, I'm taken