Apple puts this functionality in to beat down competing products. It has nothing to do with malicious apps. Google Voice was approved by the VP of Apple himself. Then after the fact, they blocked the app for competitive reasons. I really don't think GV was a malicious program.Apple put this functionality in the phone to be able to remove malicious apps that may have slipped through their authorization process. It has not been used to remove apps that were removed from the App Store.