> In isolation, nobody _wants_ their vehicle to spew black smoke.

Honestly, when I was 12 years old and my dad floored the TDi in our Land Rover (with the diesel particulate filter deleted), it felt satisfying in a way, like the machine is allowed to be its most efficient self.

Now that I'm adult, I know that it's marginal gains for the car and terrible for the environment, but there are people that have the thinking capability of a 12 year old driving these trucks. I don't think all of them do it because of spite (though I'm sure most do).