Pretty simple - obey the rules of the road if you ride on the road. Corollary - obey the rules of pedestrians if you ride on the sidewalk (stop at intersections to walk bike across or ride across slowly after stopping).
I don't begrudge SxS riders on roads with no shoulders and narrow lanes. I do think that riding SxS way out in the driving lane on roads with wide lanes and wide shoulders is ridiculous.
