Nothing on facebook is truly private. There are adcoms that do facebook 'background checks' and have facebook admins report inappropriate content - for example pictures and comments regarding cadavers...that one will get you kicked out of medical school in a hurry. It has happened before. So, be professional...and one more thing, those so called "groups" and friend settings are a joke when everything is said and done - sorry to burst any bubbles of people that were unaware of this...