I blame tidy people. I mean, I never chuck anything out of the car, and the car's a tip. Eventually it gets on my nerves, and I tidy it up and put it in the bin.   I suspect these chuckers have impeccable car interiors.

Car cams to avoid getting falsely accused in accidents are easily enough available, and could rapidly pay forthemselves in reduced insurance costs. Though of course if something is your fault they show up. That as well. Bu I can't imagine the police stirring themselves over this kind of thing with litter unless it was pretty extreme. And clearly dangerous.