Riding on the sidewalk is a bad, dangerous habit to break. Many generations of well-meaning parents, teachers, traffic engineers, and other adult authority figures try to "protect" the fledgeling cyclist from the "evil dangers" of the roadway by restricting them to the sidewalk thereby endangering everyone else. The little one grows up to be still endangering themselves as well as innocent others with their now engrained habit of sidewalk riding. Add to that mix the new drive up ramps at streetcorner intersections for the physically disabled wheelchair users that many cities have been installing and you have a real dangerous accident waiting to happen with these same cyclists who don't even glance behind or around them as they enter the street. Can't correct the problem? Just be defensive on the road!