I have a daughter with Down's syndrome. She loves to bike. So we go together to the Choate Campus. For a very short distance, we use the sidewalk. I'm afraid when we have to ride on the street. We clearly understand that we have to yield to pedestrians and we do. The problem is not that the law is not being enforce, the problem is that some people are simply rude. Some cars don't pay attention to bikes on the road and some bikes don't pay attention to people on the sidewalk. If the law were enforced, what would you choose: Paying a ticket when your daughter rides on the sidewalk? or having the driver, who kills her on the street, sent to prison? For me is clear, I would pay the ticket. But I think that there is no need, because there are very few pedestrians (less than cars) and we are always respectful.
Let's share the road and enjoy life.