I'm a gimp anyways, thanks to a drunk driver, and my left leg looks like chopped liver from knee to toe. In that case, I almost never even wear sandals. Heck, very rarely even wear shorts since my left calf looks like a pencil next to my right calf. Plus, it tends to hurt walking bare foot for my left foot with the nerve damage I have. Every step feels like 50 tacks being rammed into my heel.

So, nope, "I" don't drive barefoot. I do wear DC track shoes when I autoX though (and almost every day for the hell of it) and they have very little sole, so maybe it's as close to barefoot as I will ever get in a car. As for how I feel about other drivers driving barefoot.... I have no "major" issue with it until they hit me. I do tend to believe it impairs their pedal operation slightly, especially with a clutch, but that's just my opinion.