Old fashioned? No, just different.
Each of us is comfortable with exactly how much we want to say about ourselves. Some want to be anonymous for reasons beyond surface appearances, it may be work related, security related... or that last failed marriage!
Just like going to a party... there will be some who speak loud, tell us everything and are the life of the party. Then there are others who prefer to hang out in the background, watch what happens, and still have a great time. Both types make the party fun... and that is what we are trying to do here.