“Facebook has said that it is within its terms of service to see what users are typing even when the status or comment is never posted on the social network.
The Menlo Park, Calif., company confirmed that it can track users’ unpublished posts after two Facebook researchers disclosed that they had tracked the activity of about 5 million random Facebook users in the U.S. and England.
The researchers’ study looked at how often these users censored themselves while typing posts and comments on Facebook. If users typed more than five characters, the content was tracked. It was considered to be self-censored if it was not published within 10 minutes of being typed.”