Even if he is riding against traffic, there still might be a pedestrian who is walking toward the car's right side.  Back when I lived close to my office, I would regularly walk the two blocks to work.  Almost DAILY I encountered drivers who stopped in the intersection (Tudor & Old Seward) -- not behind the limit line -- and was almost hit because the drivers were looking left at oncoming traffic and had no awareness of what was happening to their right.  Like Mr. James, I am very hard to miss when I walk or bike -- I wear lots of hi-viz neon yellow and orange with plenty of reflective panels and lots of bright flashing lights.  I realize I look like an alien Christmas tree, but sometimes I'd rather walk/bike than drive, and I want to make sure I'm visible.