> they're impossible to shut down They're impossible to shut down without (potentially) affecting innocent bystanders. If they don't care, they absolutely can

> they're impossible to shut down They're impossible to shut down without (potentially) affecting innocent bystanders. If they don't care, they absolutely can and do shut down towers. In this case, if they judge anyone broadcasting or using this network as subversive, then there are no bystanders, only accomplices. And, thanks to the tyranny of the inverse square law, it becomes much easier to sniff out broadcasters/uplinks as well. The easiest way to mitigate this is to do both -- rebroadcast a cell connection over WiFi, and do so intermittently and in varying locations to complicate triangulation.