I have generally noticed that many native Indians of unrefined variety exhibit clumsy mannerism which are not palatable to International Travellers. For example right from getting overhead luggage, seat swapping, loud taking, moving while belt sign is on, picking up quarells with crew, poor toilet habits, food preferences, asking illogical questions to crew, etc etc. It would be high time there is some sort of coaching for these would be travellers, like China has introduced recently for their natives flying overseas. If not these misunderstanding will be there. Of course, when I say this to my fellow Mumbaikaars they get angry with me. But after all Mumbai has also earned the coveted prize of "Most Rudest City". So no wonder about this incident. Good lesson in the long run.
