That's pathetic of them. I don't know why people act the way they do behind the wheel sometimes. You can take two cars in the same place and have them drive to the same destination. one of them traveling at 80mph and the other at 55mph and there won't be a great deal of difference between them in arriving where they are going. For people to go nuts like that over a few seconds because someone is waling across the road is crazy.
One of them got so mad he ran the stopsign just about hitting me and then turned back around and accosted me right by my apartment. He wanted to fight me. I stood there dumbfounded that someone who should know better was willing to come to blows over HIM disobeying the law. I regained my wits and despite being confident that I could win a fight, told him that running a stopsign was a basic traffic rule and that he had broken it. Then I turned aroudn and walked off leaving him fuming. But then again I can make people mad too. If someone flips me off, I usally sit and laugh at them. Not always the best idea...
But yeah, even the most mild-mannered person can sometimes become a demon behind the wheel.