I'm aware, I just think the bracket is too much information. Besides, laws can be changed and increasingly laws are broken with zero repercussions. What is to stop Microsoft from not "transmitting" the information yet still using it internally for targeted advertising? Honestly the raw date of birth isn't even needed for that. An age bracket would do fine and as far as I'm aware there are zero restrictions on Microsoft using that.

No, if your actually only interested in protecting kids, I think this is vast overkill. This is a mesure for surveillance and advertising and I think age brackets are more than sufficient for accomplishing that.