I ride on the sidewalk sometimes, especially when it's dark and rainy and there are big parked trucks blocking the bike path. It's along the same road that this whole thread started, and it's rarely used by pedestrians (if there are, I'll slow down and always verbalize if I'm coming up behind them).

I've had to alter my return route because the other direction of this road (they're both one way), people tend to use as a speed track. Which, incidentally, was used as a temporary Indy course when we actually had them. Now the bike path is blocked off by big huge barriers for the Olympics so there's really no place for cyclists to go.

It's getting off topic a bit, but I find it ironic how the powers-that-be tell residents to leave the car at home, to bike or take transit during the Olympics, but on the next breath they tell us to expect hours-long delays on transit or bike paths being closed.