This will tell the world that you have been the victim of identity theft, and that no one should extend credit in your name without first contacting you and confirming that the person using your name in indeed you.

FORBES: Dealing with Identity Theft

That would be protection from the reputation ruining that comes from someone tagging you in a nasty blog post and having it turn up as the first result in a Google search of your name, but also protecting people from themselves in this age of indiscreet Facebooking and Tweetaholicism.

FORBES: The Beauty of Never Forgetting