Matt McKeon has a very persuasive set of images, showing the extent of changes to your private information on Facebook between 2005 and last month:
2005
Compare that to the latest set of changes to the default Facebook privacy settings:
April 2010
Facebook is a great service. I have a profile, and so does nearly everyone I know under the age of 60.
However, Facebook hasn’t always managed its users’ data well. In the beginning, it restricted the visibility of a user’s personal information to just their friends and their “network” (college or school). Over the past couple of years, the default privacy settings for a Facebook user’s personal information have become more and more permissive. They’ve also changed how your personal information is classified several times, sometimes in a manner that has been confusing for their users. This has largely been part of Facebook’s effort to correlate, publish, and monetize their social graph: a massive database of entities and links that covers everything from where you live to the movies you like and the people you trust.