The biggest issue to me is tha fact that a qualified controller judged it acceptable to break FAA, and therefore federal laws, by allowing an unlicensed person to transmit on RT.
RT which is recorded and stored as a legal requirement (as any ATCO or pilot knows).
So not only was it ill advised, but very poor judgement from someone who has to use judgment every day.
Not exactly professional nor clever, irrespective of your individual thoughts on the rules. Sounds like he was asking for trouble.