The FasTrak system shows the occupancy setting, it’s obvious when people are displaying the wrong setting.
However, when you’re looking at 100’s of cars doing the same thing false positives only account for a small percentage of that.
And the point about cops is exactly the issue - there is an actual human who observes and notes that it was a false positive, vs an anonymous report with no counterpoint entered into whatever database is tracking these reports.
And I think at certain times it's only >= 2 people.