Note that since Lodsys apparently sues over use of in-app purchases, you don't even have to block the app entirely, which would fall foul of the App Store guide

Note that since Lodsys apparently sues over use of in-app purchases, you don't even have to block the app entirely, which would fall foul of the App Store guidelines on iOS (2.22) and might alienate users. Just disable the in-app purchases...