I don't like people that drive in the left lane at whatever speed and assume that since they are going "fast enough" they shouldn't have to move. That doesn't mean that someone has to get up on your ass to do a light flash [like described above], but if they are approaching, and provide one, it's much less rude (for all) to just move aside and let them by. Let's not forget, being passed on the right, is not the safest move for anyone involved on a freeway. Doesn't matter what the speed is. There is a reason that you aren't supposed to be passed on the right.
That said, driving from Fort Worth to Uptown Dallas everyday, I know I've gotten quite aggressive behind the wheel. I'm constantly in a big hurry for very little reason, and I've become a terribly addicted lane jumper. At least my goal in doing it all is to not cut people off, but I'm sure people are still saying "what a lunatic" when I work my way through traffic. It's effective to a point... I can still make Lemmon/75 to 2 miles north of 820/377 (garage to garage) in 50-55 minutes in the 5 o'clock/6 o'clock traffic most days.