Can I bring this to a different level? Maybe it is considerate, maybe it isn't. We can go back and forth. But why is it such an anathema to some people (NO, not people here, I mean generally) to just take themselves out of the equation, or, to phrase it differently, why do we always work to the lowest common denominator? I'm as busy as the next guy, maybe moreso in some cases, but I don't sit there in the lot thinking "Well, fuck them and their fancy cars" or "WOW, I'm going to be an awesome, considerate person now and be a moral and social hero!" But I take it back anyway, because at that point, there is no argument. It MAY be overboard, but it appeases (most) everyone. Same with the left hand lane. Maybe I AM going 80. Maybe you AREN'T going anywhere in front of me. Maybe you ARE driving like an idiot. It's not my place to be the moral crusader. I move over, and let you deal with the issues in your life the way you want to.
I take myself out of the equation. I think if more people took themselves out of the equation - and you can apply this to many other things as well, including politics, the rash of "abuses" that we're reading about, the NFL, and 100 other things - I tend to think the world would be, if not a better place, than at least a more calm, peaceful place. Not everything has to be a battle, and not everything has to be a WIN at the expense of the other guy.