I find it best to try and ignore loadies. Most of the banter stems from a massive inferiority complex.
If they wanted to fly, they would have made the grade for the pilot, if they wanted to be fine leaders of men, they would have become officers.
Instead, they wallow in their own irrelevance, sneering at the real aircrew and using the flying suit as a cloak of respectability.
Apart from that, the rear crew are delightful.