Bicycling has a feature article this month called "Bike town" where they hand free cycles to ordinary people. There are two whole pages that show an entire family riding on the sidewalks heading for school! Yup! All seven memebers on the sidewalk! lol!
I didn't find anything wrong with the picture except when the mother states "Rebecca (Kindergartner) can go 12 mph" while riding on the sidewalk! I happen to think this is too fast and the child should be told to go slower otherwise, there's nothing wrong in general. Sure there are risks riding on the sidewalks but if done slowly, it's safer than having a 5 year old riding with cars.
I know some of you hardcore riders would want that child mixing it with the trucks but that's crazy. The older kids should be on the streets but maybe they live in the burbs where there's very little pedestrian traffic on the sidewalks. It's also possible they live in an area where the traffic is fast and the roads are narrow.
Anyway, I find it interesting that Bicycling would advocate this postion.