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There are a lot of "Area Control" boardgames out there that would provide a framework:https://www.boardgamegeek.com/boardgamemechanic/2080/area-control-area-influenceYou would need to come up with the specific city street maps and such.I think you could do a really interesting version of a game like Carcassonne for the larger social media organised riots.
I'm sure that was a rule book and figures out called No Go Zone.