Your application was suspended from interacting with the Twitter API because it violates our API Terms of Service (http://dev.twitter.com/pages/api_terms), in that the application in question is designed to take advantage of user credentials to post unwanted content on their accounts. Moreover, this application violates user privacy by allowing other users to access eachother's accounts should that account have authorized the usage of your application. This encourages users to violate the Twitter Rules (http://support.twitter.com/articles/18311). It's best for both our users and your users if your application follows the rules, as the very nature of this application is in violation of our API Terms of Service we will not be reactivating this key.
Thanks for your understanding,