Well, I don't worry about them. They must love paying the higher cost of fuel accellerating to those higher speeds. I cannot see any validity in peoples complaints of how much it costs to fill their tanks when they drive they way they do.
Kind of makes me think that the folks in charge of this country while Nixon was in office were genius, even the crooks were genius, compared to the ones we have today. Lowering the speed limit to 55 mph. to save fuel, nationwide. And creating that thing called Day Light Savings Time to save on energy usage nationwide.
I am sure there are people who would disagree with me on the point of the 55 mph speed limit. But most of them would argue their point from the aspect of higher safety standards on cars today and more fuel efficiency of cars today, compared to that time frame. But the thing they will not see is the fact that safety and fuel efficiency will help us today in stabilizing gasoline prices here, with a lower speed limit and few fatal accidents. Most people do not even realize that there costs behind the problem of the speed limit being "too slow", like higher insurance premiums.
It costs people more to accelerate their vehicles to 70 mph than it does to accelerate to a speed of 55 mph. I see no reason to go over the speed limit.
Now that I have gone this far astray of your question, I will put it to an end.