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Badenoch, other members of a travelling party do not deserve to be banned for the perceived or actual offensive actions of one traveller in the party.
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Mnyclfyer, flying (and mroe particularly being told you will not be flying) is stressful and leads people to react in many different ways, including negative reactions. It is never a good idea to get into an argument or swear at airline employees. While they are in the service industry and the customer is always supposed to be right, they hold the cards and have wide latitude to "punish" what they see as offensive behaviour. hopefully this will be a painful lesson for your partner and I wish you good luck in getting compensation from the airline - I would focus any complaint to them on the knock on effect to you and other family members.