According to Facebook "People tell us they’re sometimes worried about sharing information with apps and want more choice and control over what personal information apps receive. Today’s announcements put power and control squarely in people’s hands."
Facebook listened to them and made some changes like :
Anonymous Login :
you can log in to apps without sharing your personal information from Facebook.
Line by Line Control with Facebook Login :
You can choose which information you want to share and uncheck the ones you don't.
