Good point! You won't see me on a bicycle after dark.
You aside, however, there are too many aggressive daytime drivers up on the popular routes -- Mulholland, Kanan, and sometimes Latigo Canyon. I'm thankful that the CHP patrols the routes thoroughly; many Sundays I see several stops along a short stretch of road. Still, I've had my share of close calls, where a few inches here or there would have made me a bug on some driver's windshield.
I haven't seen many Roadsters up there, however. Just one so far, although the recent rally took many owners along those routes.