Perjury would be on the table. Fraud, too, maybe, against the actual owner of the content. At a minimum any lawyer involved would probably face disbarment for fraud upon the court; the fact that they're all pro se cases makes me suspicious that a lawyer might have been involved in drafting some boilerplate language but not involved in the actual litigation, but it'd be difficult to argue that, eg, the reputation management firm's general counsel didn't know what was going on.