Suggestion
1. Recognize both Greenfield (www. … . kid) areas, where kid-friendly parties can reside, perhaps monitored by a voluntary watchdog organization, and Redlight (www. … .xxx) areas where adult, explicit purveyors can reside. Most commercial adult sites might voluntarily enter that district, since they would be easy to find by their customers. Predatory sites, not in the .xxx domain, should be blacklisted.
Note that these two areas will only occupy a few percent of the web content, since most commercial and most scientific sites will not want to label themselves green nor red. Not green is not red, and not red is not green!
2. Establish a consortium, supported by by the vendors of filtering tools and major portals, that would survey the non .xxx portion of the Internet, and locate, classify, and list objectionable, predator sites for all . It would share the redundant work of identifying objectionable sites, make the filtering more consistent, and provide a forum to allow appeals when sites have been misclassified. The filtering products would then still compete on the basis of ease-of-use, compatibility, methods of parental control, and price.