Submitted by Erik Wegner
on
Aufmacherbild
Heise has developed a solution to provide more privacy to users of social networks: http://www.heise.de/ct/artikel/2-Klicks-fuer-mehr-Datenschutz-1333879.html 
To use this script with Drupal, there is the module »Social share privacy«: http://drupal.org/project/socialshareprivacy