As a pilot who operated into JFK for a few years and was actually based there for three with an American outfit the recording really made my day.
I knew many of the controllers from visiting the tower and having the odd pizza in The Owl. They were, and still are... great guys.
Let's lighten up on this. They allowed a young kid to read out a simple sentence to the amusement of the pilots on frequency.
It caused no problems and gave people something to smile about so don't let any suits try to make a big issue out of this.