I just go around. You cant teach MILLIONS of inconsiderate people how to suddenly drive better. Although when I driv ein the southeast I notice people are pretty good about staying out of the left lane.
my vote is to go around them as safely as possible unless you encounter the dimwit who will actively try to impede your progress (officially termed aggressive driving) ... then just plain get around them ...
the M5 is one fine car for getting around slower drivers with a minimum of fuss!
I've become quite crazy about it. Most pepole move over pretty quick, but for those who don't, I use the beams, and for those who still dont, i edge up, tail em, then move over, and cut them off. They generally move over.
If they get brash, I get brash. Not going into details, but I'm damn sick and tired of it.
On the other hand, if / when people DO move over, I make certain to wave to them. Even if they don't see it, others do. And they do learn.
I gave up on flashing the lights as a subtle reminder. Most of the mindless SUV "intimidators" take this as throwing down the gauntlet. If they didn't match the speed to the car to the right before, they now do it intentionally.
Since most American drivers only use their rear view mirror as an ornament holder and, as one poster commented, are too lazy to go to the effort of changing lanes, I simply assess the situation and go around them on the right.
Its a huge PITA, but until we make this infraction more poplular than speeding from a tax revenue stand point, its not likely to change.
I think every driver ought to have to take a visual, reflex, written, and actual drving test every 5 years, and make it tough. Drivers need to pay for it, although a scale could be provided so that poor people who can drive are still able to without any financial hardship.
I know I can drive better drunk than some people sober, because they don't know how to drive, are not paying attention, don't have proper reflexes, and because they do not understand the rules/law.
Legislators have too often taken the easy steps to make cars safer, and lower speed limits to accomodate bad driving. All the steps now taken require the driver to be completely mindless and unaware, and drive from point A to point B without any knowledge that they are even driving. If I go 55 MPH on a rural interstate with little traffic, I will fall asleep.
Learn to drive, and don't license/insure those that can't.