Digital Smarts - Two Internets?

Should there be a separate Internet for children?  Conor Friedersdorf’s article in The Atlantic reminds parents that the Internet is “a place where the violence is more graphic than any R-rated movie, the sex is more salacious than any strip club, and the bullies get 24-hour access to kids’ bedrooms.” He proposes instead a “youth net” for kids younger than 15, with content similar to a PG movie and where decisions about content moderation are made with children in mind, freedom of speech is not paramount, and everything is delivered on special youth friendly devices. Social media apps like Facebook, Instagram and Youtube would all be banned and would be seen as the equivalent of getting a drivers license. What are your thoughts?