Striking the balance between what we want the world to know about us and what the world needs to know about us is imperative for any individual looking to keep their sanity. Humans cannot be trusted with too much information, especially personal information.
On the other hand, it does not do much for one when little to no information about one's personality ( or do I say specialites) is disclosed from the real world. We need one another at some point and for some reason to thrive in this world.