The thing is there are people who think that riding a motorcycle without a helmet should be against the law. Not because it reduces injuries in ERs and save lives, but because supposedly the relatives of those people have interests greater than that of the individual being reckless. That to me is troubling since then by such inference that obese people should be fined until they get closer to their ideal BMI. Or smokers too. Hell, anyone that enjoys coffee a bit too much. The point is where you draw the line? I think we should err towards the individual liberty side of that line as the unintended consequences will shake out easier in that regard than if we decide towards paternalism.