Some of the "left lane bandit" behavior is due to passive-aggressive behavior. Some doing the deed know the affect of their behavior.
However, I think most are just the typical ignorant sheep infesting society unaware of themselves, their surroundings, basically brain dead with the vast majority of their thoughts based upon their miniscule universe that generally consists of what is on TV that night and what sale at the store is on this week.
Toss in a lack of training and self-centeredness and you see idiots poking along, impeding others when there is nothing other than the driver's behavior making them place their car/truck so as to impede traffic flow.
As another poster mentioned a few months ago..... an observation I have witnessed and pondered myself.........
There must be some unknown magnetic force that draws vehicles close together. Even if there is plenty of space on the road vehicles pack together...... brought together by the relentless tug of that unknown magnetic force!!!!
Another reason for left lane banditry, especially amongst the majority who are mentally inferior, is what I refer to as the "pack instinct."
Humans are a pack animal. We naturally band together akin to wolves and lions. We are not a lone critter like many of the big cats who typically only interact with other adults when breeding or fighting over territory.
Driving down the road, plenty of room to spread out to maximize safety, you typically see the majority of idiots bunching together, often so closely that one wrong move or sudden problem leads to a scene reminiscent of a bumper car ride at the fair.
I have had other drivers catch up with my lone-travelling truck slow down and drive close by. I slow down and most go back to their original speed and depart. However, the dumbest of the dumb will also slow down, trying to instinctively form a pack, a herd of cars travelling at velocities nature did not intend our bodies to move at.
Yesterday, one of the blithering idiotic imbeciles reached me and slowed down. Happens all the time. Made me mad so I slammed on the brakes (no one behind me) and slowed from 55 to 40 mph. What did the idiot do? You're right!!!! Hit his brakes and dared his head around, looking for the reason to slow!!!!!! After realizing there was no reason I got the typical dirty look and the idiot sped up.
In days of yore the idiots were eaten by predators or killed by other humans. Nowadays, there is nothing to cull the unfit from the herd.
We are stuck with the idiots.
What a shame.