Yes, that's exactly what I'm telling you. Semi drivers alter their fuel/air mixture for the power gains, but doing this dumb as fuck "rolling coal" bullshit is literally wasting gas. I'd wager that just one instance of a semi "rolling coal" would be the equivalent of buying about half a tank in one of these diesel pickup trucks, and then just dumping it on the sidewalk. As a driver that owns my own shit, gas costs me anywhere between 70,000 to 100,000 dollars per year. A semi driver doing dumb shit like this, isn't going to be in the business very long.
So, my point: There are plenty of fucktard truckers out on the road, no doubt, but in context of this discussion, these coal rolling morons are almost exclusively limited to the morons in their own personal shit. In context to your initial point, the number of working truck drivers willing to do this shit are so few, as to be inconsequential to this discussion. Truck drivers that want to be assholes have other, far more effective, and far more dangerous methods of being fucking douchebags to motorists.