Frankly, I think all privacy is dead. My uncle who is 90 and lives is Hawaii is all excited because he found Google maps, looked up his address and found street level photos of his house. He was thrilled - I on the other hand think it is awful that someone can find our address and get a picture of our house.
How do you protect yourself from that? I would say stay off line and don't join any social sites, but as you can see with Google maps, you don't have to be online to have your "business" out there for everyone to see.