The privacy settings on Facebook, that allow your updates to be made Public or Private, have changed quite a bit recently. Much more updates and photos are made public.
Unless you reset your settings on privacy, Facebook opens up private walled gardens in their bid to compete with Twitters real time open stream of information.
To protect your reputation, personal brand, bank account, and privacy, you need to be very careful what you write and post on social media channels.
Via Peter Hoeve