* A site must be certified by some board in order to be accessible. At what level is a site certified? Root level? Page level? Individual content item.
* A site hosts user generated content. This could be as small as comments on an article, or as large as YouTube. How is the site certified? If each piece of content must be certified, who assumes responsibility for certification?
* A site is certified as appropriate for all ages. The owner of the site then puts content that would have caused to to fail certification. At what interval is a site expected to recertify? What is the ramification for certification and then hosting of objectionable content?
* You have a process that is onerous for site administrators to comply with in order to host content for children. What incentive is for them to comply vs. not host a site that requires certification?
* As a parent, you install a compliant operating system that enforces this system. Sites comply with the program and it works without exception. Kids talk, as they do, and share how to get around this system by using a Linux live environment to boot into an OS that does not enforce the parental control header. How do you prevent this?
* As a parent, you install a compliant operating system that enforces this system. Your kid either does not know how, or is prevented from circumventing these access controls. They have one or more friends that have computers that are not blocked from accessing this content. How do you prevent them from accessing content in this system?