Good question! I'm aware of that exception in Idaho, and have always thought it interesting. There IS a difference between a bike and a car coming to a stop at a stop sign, as our outward visibility is typically much better and we can also rely on auditory clues.

To me honest, I'm not sure. I think it would depend on the context. Those particular stop signs I was referring to? I would definitely stop at them. Too many motorists running stop signs in my hood. On the other hand, one out in the middle of nowhere with near infinite visibility in all directions would probably be a different story.