In reply to Fredt:
A topic close to my heart as a runner. This lunchtime I am glad to say the cars that came past me (I run facing the oncoming traffic), all gave me enough room, but this is not always the case.
I can say that, as someone who has run around 1300 miles this year, bashing the wing mirror is just not the answer no matter how annoyed you are. Get the licence plate number and tell the Police. Taking the law into your own hands in this way could see you injured, punched or prosecuted and I'm not sure any of it will do your long-term wellbeing any good.
That being said, there have been times where I have been passed so close that I have banged on the car as they passed to let them know that they are putting my life at risk. This is rare, thankfully. I wouldn't be smashing a wing mirror though.
There's also the point about whether the pedestrian has a right to be there or not. As a runner I have been abused by drivers for not running on the pavement and using the road. Sorry, but it's my right to run on the road (unless it is a Motorway etc.) and drivers need to be aware of all potential hazards, including pedestrians. Quite often where I run the pavements are in a terrible state and are not fit to run on anyway - choosing the road is the better option.
That being said, there are 2 notable stretches of road where I simply choose not to run because they are fast, narrow and twisting. Yes, I have the right to run there but in those 2 cases discretion is the better part of valour and the risks of running up and down there are just not worth it to me, my wife or my 2 kids.
I can only suggest that you find a way of expressing your annoyance in a way that doesn't escalate the problem and gives you some sense of satisfaction.
Good luck.