50 years ago this woulndt haven been a problem, and was probably how alot of air trafic controlers were taught. There would have been a script, the kids were only dealing with pilots taking off (so all the checks had allready been done and the kids were just giving the all clear to the pilot). Its a joke that people really do think that this is serious, the kids were just mouth peices, beeing given the oportunity to do something fun, and to also not make it as boring for them.
People really do need to lighten up and realise that letting red tape rule the world is going to cause more problems and limit any kind of safe and harmless fun happen. There was nothing wrong with happened, I say this needs to happen more, specialy in such a demanding and stressfull job, a realse is always a great thing.