I haven't read all the messages, but think they will only remove the backup to icloud, but the data won't be deleted, it's not the same that the iOS 5 delete the caches folder.
Now it wont be backed up, but won't be deleted either, as long as it's on the librarys folder.
Anyways, I think the best option is let the programmer to decide if he wants to back up to icloud or not