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.

"Try" to hurt?

Half-burned diesel particulate is absolutely cancerous, it can enter the bloodstream and cross the blood-brain barrier and they're generating clouds of it, probably thousands of times more than what a modern 18 wheeler puts out in half an hour of driving. And they're doing it to someone breathing hard.

If I sprayed some cancerous chemical in someone's face, I'd be arrested within the hour. I'd be on the regional news, even.

The double standards around motor vehicles never cease to amaze.