p.s. Facebook have this for years. this is how to opt out: https://www.facebook.com/settings?tab=ads&section=social&view https://www.facebook.com/settings?tab

p.s. Facebook have this for years. this is how to opt out: https://www.facebook.com/settings?tab=ads&section=social&view https://www.facebook.com/settings?tab=ads&section=social&vie... (select "Pair my social actions with ads for - No one") Article about it: http://www.forbes.com/sites/anthonykosner/2013/01/21/facebook-is-recycling-your-likes-to-promote-stories-youve-never-seen-to-all-your-friends/ http://www.forbes.com/sites/anthonykosner/2013/01/21/faceboo... There were several HN posts on this as well will update once I find them...