In one of his interviews, Daniel Vitalis spoke of how he envisions raising children as vegans may some day soon be viewed as child abuse, for the simple reason that their bodies are being deprived of key nutrition during the very time they need it most. Vegan kids will not grow up as healthy as omnivorous kids can potentially be, and their lives will be affected by this forever.
I see the same potential here. These kids will grow up emotionally and socially stunted. It is important to have self-esteem that is not dependent on judgements by "experts", but to take away the opportunity to interact with others during formative life stages deprives you of the ability to accept critical comments and to communicate respectfully with people you disagree with. These kids won't grow up to be dependent on the opinions of teachers and other elders in their community, but will instead grow up to be utterly dependent on the opinions and dictates of their parents. This is what often happens to kids who grow up in fundamentalist religious families. They can't function in normal society. They end up walking around in 40, 50, 60 year old bodies but have the emotional maturity of dependent 10-year olds. That's why religious people are so easy to manipulate.
While I applaud the parents for giving their children an opportunity to try a raw diet, I think forcing it on them is extreme and should be viewed as child abuse.