Ahh, but the key is in my bolding: well-behaved kids are seen but not heard, they sit quietly watching movies, eating, sleeping, reading or playing with their Nintendo (on silent mode of course,) they don't disturb other passengers... and are a delight to share a flight with in any class.

I'd have said something to the kids on the OP's flight, and if their granny objected, made my feelings clear to her as well.

As some of the other posters have commented, it is all to do with how you are brought up by your parents - and might I suggest - at school. Any time that I was taken somewhere that would be dominated by adults, I'd get the lecture about "being a good girl..." Now children think they are the centre of everything and have no understanding of how their behaviour affects others.

These days it really seems to happen so rarely and that's why it all goes wrong. I found it rather sad last week when I stood up to offer a pensioner a seat on a crowded bus (none of the hordes of kids sitting down did...) and she told me she was shocked as "it just doesn't happen any more."