Curious as to why your magnificent LittleBigPlanet level, in which Mario investigates Princess Peach's plumbing, was deleted without warning? Well, it's probably because you failed to heed Sony's "suggestions" to creators. Also, because you're a copyright-infringing sicko. The list of diplomatic commandments, issued to CVG in response to widespread confusion over LittleBigPlanet's moderation policies, reads as follows:
Ensure that the content you share with other users is suitable for all ages - everybody has access to your level if you publish it
Please respect other people's intellectual property rights. For example, don't use images, brands or logos that you're not entitled to use.
If you come across any content that you feel the need to report, then please do it responsibly. Hoax reports will be considered inappropriate behavior.
As will designing a Heavenly Sword level before Sony has the opportunity to sell you one as DLC. But don't give up, folks -- the one thing that can never be moderated is imagination!