I knew that stuff going in. Why would they support something like that? Then they couldn't make any money ha. Jailbroken iPhones, modded gaming consoles, etc. I consider it a gray area. The patch has been broken but was fixed in less than a day when SP1 was released ha. Worse comes to worse, you can roll back. Again, this is not the recommended way, but a possibility nonetheless.
If some software developer found a way to exploit that using their own version of the file (sound familiar :P), it'd be pretty lucrative. They would just have to continue to support it.