The great unspoken issue in this already-lengthy thread is, what if the car ahead of you in the left lane is already exceeding the speed limit by, say, a "safe" 5 to 7 miles per hour?
I don't encounter as much problem with slow drivers in the left lane as I do when I am in the left lane, slightly exceeding the speed limit, with traffic on the right hand side so I can't move over even if I were inclined to do so.
Still, cars will catch up with me ahead of them in the left lane, get on my bumper, and ride there as if they're just daring me not to speed up to match their excessive speed, or else to elbow my way into the right lane so they can continue on their speedful way.
And if they flash their lights at me while they're performing this stupidity, I will respond with one of the few times I ever give another driver the finger. Count on it.
I regularly drive a short portion of Interstate 95 on my comings and goings here locally, and the idiocy of so many of the drivers there is absolutely overwhelming. Speed limit is 70 in that stretch, and yet some folks there seem to think 80 is the least anyone should travel. Grrrrrr......