问题
My site has its own login system and the user can choose to connect his fb account with the site account. I wonder how the user could remove fb connection/application after being connected. I currently remove fb_id from the user table to deactivate fb connection. However, this doesn't completely remove the app from user's fb account.
回答1:
Account > Privacy Settings > Apps and Websites (Edit your settings)
In this page you can just delete apps.
This way user can deactivate/disconnect websites/apps.
来源：https://stackoverflow.com/questions/5237838/facebook-remove-app