Whenever I fly com I always make a point of saying "Don't worry about a glass of champers, just bring me the bottle, it will save you a couple of trips"!
I stagger off always with a smile on my dial and a big thank you to the girls and boys who left me alone.
I have never had a rude FA but them perhaps it's the way I treat them!
Lets face it, they are doing their job, be polite and patient and they will treat you the same.
NAP