Seems a little over the top to me. Maybe make them move seats, but to throw them off?
To me, this is just another example of how crazy NZ has become.
My brother lives in NZ, and I have visited literally dozens of times. Maybe as many as 50, over the years.
I was always amused by some of their quirks, but the latest moves by the Government to send people to jail for looking at the Christchurch killer's manifesto online, banning certain books from bookshops.... to me I find this rather chilling. I think Air NZ's "bold" move to throw these people off, and then the Government giving them an infringement, is just another step in this crazy direction.
I find it difficult to believe that "failing to comply with crew instructions" includes not removing one's fingers from one's own ears! I am not a lawyer, but i am pretty sure the scope of crew instructions is not endless - I would be interested to see what a court thinks of this. Being able to "hear" is not a requirement to be on a plane. It might be a requirement to sit an exit, but should not end up with a Government issued fine.
What a joke.