Since 2009, when Facebook introduced the ability to post statuses and photos publicly for the whole world to see, posting publicly has been the default. Today, Facebook is changing the default privacy settings for new users to Friends only. This means that when anyone signs up for Facebook, their posts will by default only be viewable by people theyve added as friends. To many of us, the distinction might be obvious, but Facebook is today taking a few more steps to make sure that even its longest-standing users know exactly who theyre posting to. Alongside its new posting defaults, Facebook will also soon prompt all of its users to do a Privacy Checkup on who theyre sharing with and with apps youve given permissions to.