I think it's a subset of people (let's call them "assholes") that do the littering, the engine revving, and so on. This is just an anecdote but usually the peop

I think it's a subset of people (let's call them "assholes") that do the littering, the engine revving, and so on. This is just an anecdote but usually the people I see throwing their rubbish out the car window are people driving cars commonly associated with young working class men with bad attitudes (boy racer cars like black astras and such). Or in other words: it's chavs. Most people are pretty decent in general, and IME chavs are bad actors along multiple dimensions.