Back in the ‘90,s IIRC there were billboards, bus signs, etc. sponsored by 1800CUTSMOG where anyone could call and report license plates of gross polluters. They would tally up possible repeat offenders with a notice via mail and if need be a visit to the ref. Maybe they’ll bring that back for gross polluters and noise violators. Easy enough to capture video today as proof. I have a list and ready 😎