I keep wondering when citizen ALPR will start augmenting some of these roles. I don't know if it's universal, but here government-owned vehicles always have an

I keep wondering when citizen ALPR will start augmenting some of these roles. I don't know if it's universal, but here government-owned vehicles always have an X in the license plate, so you wouldn't even need a database, just alert on any X-plate entering the neighborhood. Could detect strobing lights with the same cameras, and summon the Watchers automatically.