Using the Atom Publishing Protocol, also known as AtomPub, you can flag content as inappropriate so that the site administrator can take care of it.
Getting a list of inappropriate content flag options in Forums
Get a category document that lists the flags you can assign to content that you deem to be inappropriate. By flagging inappropriate content, you bring it to the attention of the site administrator.
Flagging a forum entry or reply as inappropriate
To flag a forum entry or reply as inappropriate, send an Atom entry document containing the report to the Forums content reporting mechanism.