No, but many do not and that's also why "TOSDR" exists.
> "I have read and agree to the Terms" is
> the biggest lie on the web. Together, we
> can fix that.
Facebook: "Grade E"
* Facebook stores your data whether you have an account or not.
* The service can read your private messages
* This service can view your browser history
* Deleted content is not really deleted
* This service keeps user logs for an undefined period of time