It’s not really a sheeple thing, it’s more of an “I don’t give a f*** about anyone else.” In my experience a lot of these guys lose their minds when someone cuts them off but they don’t bat an eye when they do it to someone else.
Oh, there are definitely assholes out there. The idiots who deliberately accelerate ONLY when they notice someone about to pass them (or as someone mentioned, accelerating to close the gap when another person uses their turn signal to indicate their intent to change lanes), but once they're ahead, they let off the gas and slow back down, etc.
To me, there's an interesting difference in mentality, though. The stupid sheeple aren't deliberately being assholes/inconsiderate; they're simply too stupid to be able to think more than 1 step ahead.
Another example of stupid sheeple, is when I'm coming down the road, and I see them pull up on a side road. There are no vehicles behind me for at least a 1/4 - 1/2 mile. At the distance I first see them, if they turned onto the road I'm on, and accelerated at any reasonable pace, there'd be no problem.
But I see them hesitate (because they're too stupid to be able to easily assess how quickly my vehicle is approaching), THEN at the last minute, their stupid sheeple brain decides to turn onto the road right in front of me, and of course, take their sweet time sloooooowly getting up to the speed limit.
As mentioned, they could've looked up the road when they first stopped. Seen how far up the road I was, turned onto the road and accelerated at anything other than a glacial pace to the posted speed limits, and everything would've been fine.
Alternatively, as they were trying to decide whether to make the turn, they could've looked behind me, observed that there were no vehicles behind me, and waited the few seconds until I passed, before they turned onto the road behind me (at which point, they could take their sweet time sloooooowly getting up to the posted limits).
It's not because they're assholes and deliberately want to force me to slam on my brakes to avoid t-boning them. It's because they're indecisive morons, who lack the ability to think ahead and make intelligent assessments and decisions.
When my dad taught us to play chess, one of the important facets of the game that he taught us, was learning to look as many steps ahead as possible, and consider the possible consequences of each particular action. That concept/practice helps in other areas of life, but it takes a minimum amount of intelligence (and effort) to do that. Some people are too stupid. Many are simply too lazy.