I am not naive, at least when we talk about Cyberspace. I actually think that hiding your real name, somehow expecting that this helps you against identity theft is just that - naive.

If you had more detailed info, you'd be surprised to know that it is a lot more likely that you can become a victim if nobody knows you.

If you go to Seattle you can actually buy a plane trip to see Bill Gates' house. So here you got it:

Name: BIll Gates
Address: 1835 73rd Ave NE, Medina, WA‎
Passport see more Photo: http://www.coins.ro/images/economic/Bill_Gates.jpg
Bio: http://en.wikipedia.org/wiki/Bill_Gates

now... with that information, I guess, Identity theft mafia can steal yet another $50 billion in one hit, huh?

It's like sitting at home forever as precaution against getting into a car accident. Maybe it helps, maybe it's needed for some at unity. But you have to get out to have ride.