That is extraordinary.
It is to be hoped not many school leaders are as thin skinned as these ones.
Criticism is something all pupils should be learning how to express, even to guests, and they should be learning how to receive it.
When they see their parents made unwelcome at the school for criticising it, they are being given exactly the wrong lesson.
The Warriors were not at all offended by the boys' original questions; the club's players are accustomed to much worse.
The school says the boys offended one of its core values, Manaakitanga, meaning showing respect, generosity and care for others. The ability to criticise and accept criticism should be among its values too.