Whether or not any involved content is “explicitly illegal”, they are explicitly permitted to discuss that content so long as it is related to threats to public safety and security of the US, content that may be misleading voters on voting processes, or about content that isn’t Constitutionally protected, among other exceptions; see the explicit exceptions on pp. 5-6. As framed, the exceptions are cumulative and trump the restrictions, so, e.g., a BOLO for content whose context was efforts to protect the public safety and security of the US would permissible under the injunction even if the content was itself Constitutionally protected free speech.