Whatever the number is; it’s not enough. I think a number of passive-aggressive people intentionally drive in the left “passing” lane merely to slow up faster drivers.
Unless you daily make a sudden U-Turn across a solid double yellow line from the right lane with your right blinker on, you are not pissing off sufficient quantities of other motorists
Bumper sticker from a Brother Dave Gardner joke (The Motorcycle Story): “I may be slow, but I’m ahead of you.”