If you don't have any interest in Facebook apps (and, let's face it, many of them are suspect or just plain spammy), Facebook offers an option that works like a kill switch to keep Facebook apps and other websites from sharing or accessing your information. All you need to do is turn off Platform.
Picture: Craig Myran Photography/Flickr
Facebook Platform is the way games, applications and websites are integrated with Facebook. It allows sharing of your information for the apps or sites you visit, and it also allows your friends' Facebook apps to access your private data.
Although you can control app information sharing on an individual basis on Facebook, as we recommend in our guide to Facebook privacy, turning off Platform is the surest way to keep your Facebook information from being shared to any apps or sites.
However, doing so also means you won't be able to log into websites or apps using Facebook, and friends won't be able to share information with you through apps. Here's the warning Facebook gives about turning off Platform:
If you get too many CityVille notifications as it is, don't use any Facebook apps and don't use it to log into other sites, you can turn off Platform by going to your Facebook privacy settings, then clicking the Edit button in the "Apps you use" section.
Sophos' Naked Security blog offers more details on managing your app privacy settings in the link below.