How can I block apps and game invitations once and for all in Facebook?
You can block app invites from specific friends from Privacy Settings » Manage Blocking » Block app invites, and you can block specific apps from Privacy Settings » Manage Blocking » Block apps. If you do not use any Facebook apps or games and want to block them all from seeing any of your information or sending you invites, you can turn off Facebook Platform completely by going to Privacy Settings » Apps, Games, and Websites and clicking Turn off all apps.
You will not be able to log into websites or applications using Facebook.
Your friends won’t be able to interact and share with you using apps and websites.
Instant personalisation will also be turned off.
Apps you’ve previously installed may still have info you shared. Please contact these apps for details on removing this data.
Accessing an application that requires #platform on will return this message,. you can then decide if you wish to re-enable ..