Facebook has done that in the past in order to force more people back into the public sharing sphere if those users had switched to more private sharing before. Of course, that has always backfired as well, and it has only made people trust Facebook even less.
Today, Facebook tried to actually improve the situation for its users by making its privacy much clearer and four times smaller than before, and also by adding an interactive "Privacy Basics" guide that explains to users one information byte at a time what various features do on its site.
There may be over one billion users on the site, but most are still unlikely to know exactly how each of Facebook's features can affect their privacy. The Privacy Basics takes users step by step through three categories called "What others see about you,""How others interact with you" and "What you see."
Going through the guide may take a while because there are many steps in each category, but it should be worth it for most people as they can learn much better than they ever could before about what they are sharing with other Facebook users and how they can control each interaction.
Facebook has had many privacy blunders in the past. The company has been fined and monitored by the FTC because of them, and it had a class action lawsuit started against it in Europe. A recent Pew Research study showed that 91 percent of the respondents believe they've "lost control over how personal information is collected and used by companies."