Sure. I don't disagree. Where the line starts is when it starts to affect me fiscally. When I in the tax paying public have to pay for fuel subsidies, pouring wider roads, excess land use for parking lots. It's one fuel crisis away from being a serious problem when all these folks financing $40k trucks need a bail out from uncle sam.
And then you can get into in the US high cost of medical when one of these ego chasers mow down an otherwise productive member of society.
If the concern is fuel usage then let's raise the fuel tax. Moralizing and telling other people that they like the wrong things isn't going to accomplish anything.