Why allow facebook to track what your forum members do on your site? All we want is to allow them to login with facebook and to allow them to like posts. So why allow facebook to index more than that?
It should not be too hard to create a facebook login and a facebook like function that blocks all further data mining functions. The only reason why facebook can track everything that every user on your site does, is because the full scripts are loaded on every page. Why not just load the scripts when they are clicked? That would be more efficient anyway.