There is also another interesting site: http://www.heise.de/newsticker/meldung/Facebook-vs-Datenschuetzer-Streit-um-Like-Button-geht-weiter-1338660.html http:/

There is also another interesting site: http://www.heise.de/newsticker/meldung/Facebook-vs-Datenschuetzer-Streit-um-Like-Button-geht-weiter-1338660.html http://www.heise.de/newsticker/meldung/Facebook-vs-Datenschu... This German site uses a double opt in button for button like "Like ". Press twice on the grey like button and then it only turns into a normal like.