About Twitter OAuth library
Favorite Links directory supports Twitter OAuth authenticating protocol that allows Twitter users to give an access to their Twitter accounts for web-based services and applications without sharing their logins and passwords. OAuth gives users flexible mechanism to grant a third-party application access to their account without having to provide that application with their credentials. It also allows users to selectively revoke an application's access to their account.
The apps you revoke never had your password, so it's your decision whether they can get to your account. Using OAuth puts the user in control - if you ever wish to stop using some application, you can disable it through Twitter instead of trusting an application to stop using your login information.