You know what?. I reckon there should an in-car thing where everyone votes on other drivers via a 'sat-link' thingo where you just punch in the rego and after enough votes a UAV appears over head loaded up with Maverick missiles and blows them into the after life THEIR 'sat-link' thing warns them to sort their shit out or be banned from the road for the rest of the day. For repeat offenders they be banned for an extra day and so on.
People who vote too much without other drivers voting for the same drivers as well get a warning.
The coppers already have the auto rego ID thingo. It could work.