A good hollar is instant and I reckon much more effective than going to see plod, who will probably do nothing. I'm more concerned with didging idiots than getting their licence number, which might be false anyway. It'd be great if the police were more interested than I think they are. But I think that they have very limited time to do too much, so have to prioritise.
I try to pick my moment to have a good bellow so that it's very difficult or even near impossible for them to retaliate. EG, they stop and I am in heavy traffic flow, ot they are in heavy traffic flow passing me, or I have an alternative escape route.
I don't think a polite word is possible most of the time.
It helps if you aren't rude and shout as a warning rather than as aggression if you are shouting to prevent a crash.
I agree, getting angry isn't best, but I sometimes act angry to make a point.
After all is this not essentially what Safespeed or other such websites are about? Reporting dangerous driving?
Dunno?
Every time I hear the SS on the radio, they talk so much bollocks that I don't bother reading what garbage may lie on their website.
I prefer IAM. But I very rarely, almost never, go there either.