For one thing, most people I know who style themselves anarchists would prefer small, more or less self-sustaining communities and networks of lose association.

Crappy consumer devices running an embedded OS easy to hack? You don't say! These things are a gold mine. They contain all the certificates and authority to act as a "tower" and are as hackable and available as any consumer device

No phone or smartphone is designed around the idea that the cell network can be "hostile" so they trust these things implicitly. Time to build a backpack rouge cell and go wandering around where "interesting" people hang out.