I wouldn't think so. If he was just being the average prick in a car, sure but this was an overt threat. If someone made death threats to me or tried to assault me with their vehicle, I'd file if I could. Hopefully none of the kids drops a valuable at home...
I've called in cars that are driving recklessly (and I'm talking extremely reckless here). I'd much rather risk a hassle filing than have a pregnant mom run over in a cross walk or someone killed because of a reckless fool...