To me, the shoe scuffing issue isn't a question of heel height but rather how one positions the foot. I don't go out in CD mode, but I do know what when I wear my male shoes I have to take them off when driving because I tend to twist my foot and scuff up my loafers. Nothing wrong with driving in socks. I would imagine the same would happen to anyone, GG or CD, wearing womens shoes, be they flats or heels. So why not just drive in stocking feet and put the shoes on again when you get where you are going? I'd like to think that safety on the road is more important than how one looks, particularly the feet that nobody outside the car is going to see.
Just my 2 cents worth... Karen