Many people still use Office on shared computers or enter dummy user
information. I believe that Word should first confirm the user information
(name, initials) before letting the user modify the document using Track
Changes.

----------------
This post is a suggestion for Microsoft, and Microsoft responds to the
suggestions with the most votes. To vote for this suggestion, click the "I
Agree" button in the message pane. If you do not see the button, follow this
link to open the suggestion in the Microsoft Web-based Newsreader and then
click "I Agree" in the message pane.

http://www.microsoft.com/office/comm...ocmanagemen t