[Stu]

I have been in cars with plenty of people who smoke whilst they drive and I've never noticed anything off about their steering. I think you're accentuating the possible dangers. The wheel can be gripped just fine whilst holding a cigarette I imagine. There is also the option of putting it in your mouth for a bit. In an emergency situation the fag is hardly going to take precedence over someones life or even the cars welfare. It's not as if it's going to find a way to distract you.

It's just this ... little cylindrical thing that gradually kills you.