The value was always in the connection not any individual datum.

Besides, I choose what information I link to this identity do I not? You're welcome to my views and their connection to each other. Doesn't mean I want you to know everything else.

What is more personal than the contents of your mind? Each interaction and comment is a piece of information which when combined is much more revealing about you than fingerprints.

It's not as personal as your diary, but it is the closest thing to it.