Yeah, I think this makes more sense, as long as you limit it to automated-fine infractions (and not things like vehicular manslaughter), and these infractions don't affect the car owner's driving record or insurance premiums.

I think it would only take one instance of a friend borrowing my car, getting a fine, and that friend refusing to pay the fine, for me to stop lending them my car -- lesson learned. Or hell, why would I even want to be friends with someone who would do that to me?