This is a really good article. It is from Wired magazine. It poses a good question with all of the Identity Theft that has been happening. What does it take to disappear?
For some of us who think about this more often that others, I think that it would be a little easier to disappear than for those who really don't know who or what is out there. I know when I was in the Navy it was all about Op-sec or Operational Security. Always thinking about what you are saying to who and when. Other times it was what you are wearing and who are you around.
My way of thinking now is a person must always think before you speak or before you publish. Once you hit "Enter" there really is no going back. Always know who, what, when, where, why, and how you know this person, place, or thing.
If you have some free time, take a look. Promise it is worth your time.