Perhaps the answer is to make the concept of social networks no longer cool; or even make them undesirable. I think it's pretty clear they are not, anyways.

I use whatsapp, line, email and photo sharing services that allow me to easily share and communicate thoughts and media with exactly who I want. It's more personal, not addictive, creates better relationships, and helps me focus more on who I am rather than how others perceive me. And of course I don't have to use facebook and be a part of all its oft-criticized problems.