Social sharing button are usually loaded directly from the servers of a social network, which means that the network can track the websites that a user visits. This plugin implements buttons for Facebook/Twitter/Google+ that are activated only after being clicked first. For a live example see: http://www.heise.de/newsticker/meldung/Code-fuer-2-Klick-Empfehlungsbutton-von-Heise-ist-erhaeltlich-1337833.html