I didn't know you were so powerless in that thread, but as staff I thought you would not encourage members to spam ad hom off topic by quoting his nonsense.
You can easily see who can moderate what when you overview a section. I did not encourage anything. "They usually have no contributions in any way or form. " - is correct in most cases and thus has nothing to do with ad hominem.
Should I pm Hilariousandco?
Any global moderator will do: hilariousandco, gruez or CyrusV. It might be worth reporting the other participant of that 'interaction' as well.