ethical issue about writing a blog about our child

Mathijs went to a "Summit for the Future" conference and someone mentioned there the ethical issue of writing a blog to our children. As soon as the children grow and they have mates who are able to read, they will be able to read such blogs too. Even more, future employers may have access to this info and all can be used for or against our children.

We decided that as soon as Timur will become 6, or may even earlier, we will stop having this blog available to a wide public.

If anyone has more info, an interesting article, or simply opinion on this issue, please don't hold back.