"Cabin crew are very professional in what they do and they constantly train to deal with all kinds of threats and emergencies, so cabin crew can deal with these situations but obviously they're not desirable and they shouldn't be happening."
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Savage said the union will talk to airlines flying out of New Zealand to find out how many incidents are occurring and whether more needs to be done to stop them happening.
Air New Zealand said it will not tolerate poor behaviour towards staff and other customers.
General manager cabin crew Leeanne Langridge said: "Unfortunately, we've seen an increase in verbal and physical abuse and poor attitudes towards our staff in the past year as more customers try to consume too much alcohol, and in some cases do so when on medication or in a state of extreme over tiredness."
She said their behaviour impacted on those they were travelling with, other customers and the airline's staff.
"The safety of our crew and customers is paramount and Air New Zealand will issue offending customers with travel bans should they fail to comply with crew instructions."
- RNZ