By default, when signing in with Facebook, users are asked for access to their birthday and news feed. The birthday is for age verification, while the news feed allows for a status to be posted on Facebook that links to threads they participate in here on Club Lexus. They should be able to disable the sharing of their forum posts on their Facebook feed by going to the main Settings menu on Facebook, selecting "App Settings" from the left-hand menu, then clicking the "ClubLexus.com" app option. This will open a list of permissions their Club Lexus login currently allows, at which time they can uncheck the news feed option to disable it.