Indeed, especially considering Lor'Themar Theron was genuinely angry when he knew what had happened, blaming not only Jaina but Garrosh (therefore including his lapdog, Fanlyr) aswell for the tragic events. Doesn't make much sense to have Silvermoon Mages, unless they went there on their own, without authority from the Regent Lord.
EDIT: Good post, Duncanîdaho.