[1] Another example is the special breed of driver who stops the traffic flow on a major road (which has the right of way) to let someone on a minor cross road

[1] Another example is the special breed of driver who stops the traffic flow on a major road (which has the right of way) to let someone on a minor cross road or parking lot exit onto the major road, thus inconveniencing everyone behind them for the self satisfaction of having helped the one person they can see. This is similar to the person on a grocery checkout line who lets someone cut in front of them; they are also putting that person ahead of every other person behind them the line. It's an interesting situation; people feel they are doing the right thing yet apparently never stop to think how they are imposing their decision on others. There's a blind-spot of sorts regarding the larger effects of their actions.