Actually, I know someone who is going to court here for supposedly using inappropriate language with another driver over who cut who off. The other driver filed a complaint and the first person disputes their version of events.

The police will act if you make a complaint. As you say, it's a he did/she did sort of argument but they will at least speak to the other driver and let him know a complaint has been filed and is on his record. Will that curtail such poor driving habits? Maybe not, but at least ExpatSueno will have tried and that's the best anyone can do.

Signature line > "You can't fix stupid"