Something just caught my eye before I accelerated out of the four way stop. It was a flag atop a scooter that was entering the crosswalk at what appeared to me to be moving at quite a clip. My heart was racing and I shuttered to think of what may have happened if I had not seen this person. I exhaled forcefully and reflected that yes, this is an example of a good reason to come to a complete stop at a stop. Without those few extra seconds the outcome may have been completely different.
On the other hand, what about the scooter rider? Are they considered a pedestrian and what are the rules for a motorized scooter?