How to use social share buttons on your website without tracing of the users by the linked social media (if they don’t want to): Social Share Privacy

http://panzi.github.io/SocialSharePrivacy/ this is what they offer (ready to implement):

See opinion of the French Commission nationale de l’informatique et des libertés (CNIL) about this solution (as consent): “Solutions pour les boutons sociaux” https://www.cnil.fr/fr/solutions-pour-les-boutons-sociaux

Example of a website with Social Share Privacy: see bottom of the page (and enjoy the cookiewarning):

http://www.nachrichtenspiegel.de/2015/06/12/wer-nichts-zu-verbergen-hat-hat-nichts-zu-befuerchten/