Ugh, most good drivers hate your type with a passion.
Who cares if you are going the speed limit, above the speed limit, or below the speed limit - if you are travelling in the left lane, traffic behind you is moving faster and/or displaying the intent to move faster, and the right lane is clear, it is YOUR responsibility to allow traffic to flow according to the intent of the law.
That is to say, YOU need to move to the right. If you force others to pass on your right, you are setting up other people, if not yourself, for possible vehicular damage and/or bodily harm. That is not cool. Just because cops rarely enforce this law (not all states make it an offense that can be cited and/or consider it a law), very few people pay as much attention to the possibility of traffic approaching to their right at a higher rate of speed than they are moving. Especially if multiple vehicles are changing lanes - it is something that can result in more than simply the sole speeder becoming involved in an accident.
Now, there are tricky situations. Sometimes drivers (like images above have demonstrated) can be impatient and unobservant of traffic ahead, but let's ignore that area for the moment.
If you are in the left lane, traveling at the same speed as traffic in the right lane, and there is clear room in the right lane, YOU should move to the right. Even if only temporarily, to let traffic pass you correctly on the left. Then you can return to lollygagging in the left for as long as you please, until more traffic approaches.
If you are in the left lane, traveling at the same speed as traffic in the right lane, but there is no room to move to the right lane... this is a sticky situation. If you and the other parties are going the speed limit, you feel worried about going faster than the speed limit. We'll ignore the fear of even going 4mph over the limit (I have never heard of any State Trooper, ever, citing for such a minimal "violation" - cities/townships can be pricks, but Troopers aren't that cruel. It's not impossible, so we'll move on). So, what do we do here? Hopefully the right lane ends up speeding up or slowing down - this solves the problem. If not, perhaps immediately throw on your Turn Signal, signaling intent to move over to the right, and perhaps drop speed by 2mph. We're hoping here, still, but perhaps the driver to your rear will recognize this as an attempt to move over, pussy-footing though it may be, and he'll grumble for sure at the slower speed, but it's likely he won't try to pass on the right the moment the opportunity presents itself.
Or, just accept the fact that 2-5mph over the limit (if the other drivers ARE going the limit) is not a big deal, and you'll likely pass enough to shift right at some point soon.
It is not your responsibility to police the highway, ensuring the letter of the law is followed as laid down by the government/DOT. That is the task of the Highway Patrol. Your responsibility, in this case, is to ensure YOU follow the intent of the law, which includes many shady areas of interpretation for sticky situations. In this case: ensuring traffic flows as intended, with people passing on the left, is something the Highway Patrol looks more favorably upon than holding up miles of bumper to bumper traffic because you are stubborn.
Most traffic jams are due to lapses in critical thinking while on the highway. Think about all possible impacts of your refusal to give up the left lane, even if changing your speed ever so slightly results in a near panic attack.
Don't play patrolman - do your part, let the cops worry about speeders. You simply need to worry about passing etiquette.
I speed, and I'm still in the left lane less than the right (or center) - and I'm often passed on the right, because I'd rather stick behind someone puttering along on the left than pass them in the wide open right-hand lane. Why? Pissing them off, sure, but I'm trying to get them used to the idea of passing on the left and the idea of yielding to traffic. I've given up a lot of momentum too by dipping into the right to allow someone to pass me properly on the left if it looks like they might just pass me on the right. It's a nod of courtesy - and sometimes even the fast drivers don't even understand the proper pass on the left mentality and are more likely to simply weave through traffic than wait a moment for left-lane drivers to yield the lane to them.
I don't expect most people to SEE these things in motion and understand what I'm doing, but I imagine at least one person has been awakened from their blissful ignorance and suddenly remembered what almost cleanly passed between their ears in driving school... or otherwise described as "jogging their memory.
[Honestly, I did not intend to write an essay! Ignorant drivers just irritate the fuck out of me. It's not even their speed that bothers me, I'm cool if they'd rather perfectly follow posted speed limits -- some people just don't have good reaction times -- but dammit they need to pay attention to everything around them and understand the rest of the laws and regulations. Oblivious people on the road, and those that ignore all other traffic considerations, do not belong on the road. They are often the ones that more often than not directly, or indirectly, cause accidents to occur, though not always being an active participant in the accident itself.]