As Alfa drivers, we know we are special (not needs), and should just ignore people in astras, box,s, shopping trollies and the like.
The problem is that if you retaliate you will get done as well.
I am royally sick of the atitude of some drivers when i overtake even on motorways! The first time i was flashed i slowed down to see what his problem was, was then cut up. I stopped my car in front of him and got out. At this point he shut up as i had a baseball bat in my hand. I then invited him out for a discussion on what his problem was. To which the brave person declined and was on the phone. I then received a visit from the Police who after my explanation took my side but cautioned me that waving a baseball bat is not ok, pointed out what if had a knife or gun! It does happen (remember what Kenneth Noyce did).
So i just smile sweetly know and disappear into the sunset.