To ensure that your public facebook, Google+ etc. profiles are working in alignment with your privacy expectations, create a new id on these services, add that profile as a friend and check to ensure things are aligned.
Insider news from google, fb is that these companies always struggle to achieve the right balance between providing expert settings and keeping-it-simple-and-stupid. So the nuances behind settings (exception cases, one off cases etc.) are often not very obvious from the description of the settings