Who is in the driver's seat?

Providence Journal: The busybodies are at it again, trying to make decisions that belong to individuals, by passing regulations that the state lacks the resources to enforce.
The Bangor, Maine, City Council approved a measure prohibiting people from smoking in their own cars when children are present. And the notion seems to be catching on in other localities.
It certainly "feels" like a good idea. It isn't very healthy for kids to be trapped in a car with a smoker puffing away.
But is it really the government's job to climb into someone's car and dictate smoking policy there?
In practical terms, police will be hard-pressed to enforce the micromanagement of such nooks and crannies of private life, unless their ranks are expanded dramatically.
Fortunately, most adults are smart enough to know they should not smoke in an enclosed car with children. Those who still miss the point might be swayed more cheaply through public-service announcements rather than through passing and enforcing laws and regulations.
The truth is, when government tries to do everything, it fails to do the most important things. It's time to bring back a modicum of common sense.