Had this happen a couple years ago. Three cars (two pulling jetskis) of kids headed to the lake, passenger in the middle car tried to push me off the road as they went by. Was able to get a full plate and a description. Called 911 and twenty minutes later CHP finally showed up. Said there was nothing they could do since they didn't witness it, and they didn't have the time to drive the ten miles to the lake and check the boat ramp.
Nice to know my tax dollars are hard at work.
FWIW, this is the same CHP district that had an officer run several bikes off the road during the Napa Valley century a few years ago.