I think the wikipedia page downplays how often it's used to try to hurt or annoy cyclists, pedestrians, or anyone who looks liberal/foreign. It's not just anti environmentalists who do it, it's a general MAGA thing.

I had a driver in a Ford F-150 do this in front of me last week as he pulled away from a light. The smoke totally blacked out the windshield for 5 seconds while I was in motion. I was totally blinded by this.

I had no idea this was a thing, much less that it was something people did on purpose.

... and for those that assume, understandably, that this is strictly a US cultural phenomenon, I must (sadly) report that I saw a very new Ram 1500 dump black exhaust onto a cyclist on the 9 between Saint-Léonard and Crans-Montana. This happened in summer of 2022.

In terms of US cultural exports, for every jazz music and snowboarding I guess there has to be some coal rolling and fake service dogs.

What on earth? I can't understand USA at all..