You clearly haven't seen me drive then. Porsche drivers don't go over the line any more than Lambo drivers, Corvette drivers, Camaros, Mustangs, etc. In fact, I would say the proportion of total Porsches on Mulholland over the line is less than for other brands. I actually haven't seen much grievious corner cutting in a while. Mostly just the half a tire over the centerline in the top turn, which you can see around to know if someone is coming. Granted, mid-day Sunday there are lots of slow moving "supercars" that will still go a bit over the line even when they see someone coming.
The ones that go completely in the other lane the most are bicycles and motorcycles. And they can't give a steering input as quickly as a car so is a narrow bike really any safer if a car is coming the other way?
Anyway, here's to you, Ronin.