Update:
A few weeks ago, a riding buddy was run off the road. I was too far ahead to catch the act on video, but the same vehicle, a unique, restored, antique pickup, passed us again. Politely that time, but I had him on video to get the plate.
The initial report to the state police was met with apathy. A still photo of the offending vehicle, emailed to the same cop, was met with hostility. He accused us (thru my buddy) of looking for trouble.
Apparently people with video cameras are making it hard for cops to get away with stuff in that state, so the cops are prosecuting people for "wiretapping" when they record police actions.
What a jerk.
I guess the only way to get justice is to catch the actual offense, and use it to file a lawsuit.