Sorry, if I wasnt clear.
My view is that I wouldnt either remonstrate or report them to the Police.
I just cant imagine anyone deliberately trying to drive someone of the road.....I cant get my head round it. I have seen drivers do all sorts of stupid things but I prefer to believe it was not intending to kill anyone.
If I've understood you correctly, you would find it hard not to remonstrate when encountering some bad driving. That's surely nothing to do with filming?
Oh, perhaps you meant you'd just keep quiet and neither remonstrate nor report to the police? In which case my first point: Doing nothing means accepting bad behaviour, and sticking your head in the sand about it. Accepting bad behaviour makes it normal, and will lead to further worse behaviour in the future. Doing something about it is what all socially responsible citizens should do, IMO.
I'd agree that most bad driving is not deliberately trying to run someone off the road, though that does happen too. Careless driving can be very nearly as dangerous, and needs feedback so that driver can improve their future behaviour. If you don't give said feedback, there's very little chance of them even realising what happened and why you were unimpressed with their driving.
Surely we're not all imagining the stupid and dangerous driving that's out there on YouTube? Why even have traffic police if it's all "by accident" and doesn't matter very much?