As much as this concerns the child's social media life, it's also a matter of the parent's experience. Parents post this stuff to share, and commiserate, and participate with other parents in the experience of parenthood. I find it difficult to accept that this girl will grow up and privately horde all of her children's images and information until they give consent to release it. Teenager tend to struggle with the fact that the people around them have lives as well.
All that said, I operate my social media very differently than this girls parent's seem to. I prune and keep friends lists very inner circle, I never post anything publicly, and I often show my children the pictures that I'm posting and get them involved in the process. they won't be surprised about social media when they become teenagers.
I think the next generation of people are just going to need to develop a thicker digital skin.