Same fucking problem. Our neighborhood has a string of thefts, (from porch pirates to stolen cars) I'd love to have something centralized and accessible to the whole community to police, but that's what flock is doing and I hate that. And even if we rolled our own, some of those asshole in the neighborhood would be bitching about kids riding bikes on empty sidewalks.
just take us back to pre-technology when we came out of our houses with baseball bats to discourage vandals.