I have mixed feelings about this.
I am not married to any particular political ideology, but generally somewhat libertarian - don't pass a law restricting people's freedom unless there is an overpowering reason for such law.

In general, I'd say that if a random idiot wants to waste fuel, it's his fuel and his idiocy.

But one liberty principle is that your freedom to wave your fists around ends at the tip of my nose. If you're dumping toxic emissions in someone's face, that would seem to fit.

Re; redneck culture
I grew up on a farm and still spend significant time in farm country. Generally my impression is that actual farm people do not have time to waste fiddling with their truck's emission controls so they can pointlessly turn money into smoke. Overall I've found that the people who live in my old farm neighborhood are more cyclist friendly than the average driver.
I have a redneck background and come from a red state and don't have much problem identifying as farm/country/hick/yokel.
But there is another redneck subculture out there that I can't really understand or identify.
Where I grew up, we all had guns but we didn't wear t-shirts that said crazy gun nut stuff on them. We drank beer, but didn't drink and drive. We didn't have Confederate flags tattooed all over our faces. And we drove trucks, but they're weren't pimped up to look like something out of a monster truck show and we surely did not deliberately sabotage them to create clouds of smoke.