Traffic violations are actually policed pretty closely because it's a source of revenue. High tech is employed to identify drivers, and even some shady tricks like shortening the yellow light. So it's not a good example.
Regardless, it's a public forum(?), there should be tons of evidence if they routinely instigate swattings.
Traffic enforcement varies widely. Larger jurisdictions here in the Pacific Northwest seem to not enforce anything outside of parking rules in paid areas.
Meanwhile some neighboring suburban jurisdictions come down harshly on passerbys, even when the stop was unjustified and no crime occured.
