That is a good question. My answer is that our blurring system is so effective that there is no possibility of recognizing a child. I believe all of that is completely covered by the general blurring principle. I don't think there is any such thing as a half-blurred or fully-blurred picture. Blurring is full and complete. So, whether it is a child, an individual or a specific region, there is no need to do anything further because, after blurring, there is no possibility of recognizing someone.
On June 17th, 2009. See this statement in context.