Interesting report from Pew Research Center.
A survey by the Pew Research Center’s Internet Project & American Life provides new data about the privacy settings people choose for their social networking profiles, and the specific steps users take to control the flow of information to different people within their networks.
About two-thirds (63%) of adults say they currently maintain a profile on a social networking site. Nearly six-in-ten (58%), say their main profile is set to be private so that only friends can see it; another 19% set their profiles to partially private so that friends of friends or networks can view them; 20% say their main profile is completely public.
The number of social network users who prune and manage their accounts has increased: 63% of them have deleted people from their “friends” lists, up from 56% in 2009; 44% have deleted comments made by others on their profile; and 37% have removed their names from photos that were tagged to identify them.