I worry about the long-term feasibility of relying on it to establish something significantly different from the state.
[I]n my experience, community engagement is always greatest when situated against the state (or the prevailing society more generally). More to the point, the greatness arising from community engagement is all too often embedded within the very statism you're rallying against.
E.g., the action of Free Geek is only possible within a throwaway society.
Governance is boring and unrewarding work; few communities of direct action can survive growing the the point where they must govern themselves, because by then the personal bonds are too diffuse to maintain cohesion of the group. Let alone growing large enough to displace the state.