Can't speak for parent. For me, I don't care if people know the real person behind the post. But I don't want someone to be able to see a list of everything I have ever said. And unfortunately there is no way to do one without the other.

Just like everyday conversation. I can speak without anonymity. But I would hate for someone to go look at some of the things I said 20 years ago.

Because the information people give away is more important than their identity.