Are Kid Site Social Networking Sites?

"If the communication occurs outside of a virtual worlds website, in the form of an email to and from members, does this mean such a service has a social networking component?" ~360blog (Aug 6)
Some of the social networking sites out there for kids really don't have that much of a social aspect to them. In a way this is a good thing, no messaging means no predators able to get to them. But if there's no messaging then is it really a social networking site?
To truly be a social networking site there needs to be some interaction, some way to communicate with each other. These sites are just really great gaming sites for kids, but I don't think they qualify as social networking sites.
~admin