I feel it might be time to legislate this, there are perfectly legitimate reasons to drive a very large car, like, you live 100 miles from the nearest town and there are no roads, only swamp, marsh and desert between you and the grocery, or you haul around your pet cow all day.. Good, have your car, you need it.
In every other case. You don't and you're an idiot helping to accelerate the problem as this now becomes a weapons race on the road, nobody with a normal-sized car will want to drive it surrounded by idiot-cars, as they're simply too dangerous to be around in anything besides an idiot car.