radeng, it's not just limited to you. There are plenty of us 'young uns' who have also been instilled with some of the common courtesy. It makes sense. I know what you mean about getting the red carpet treatment for being courteous.
Sadly I have to admit that occasionally I fall asleep even before the safety briefing starts, and no-one bothers to wake me up. The other day I was dead to the world the minute I strapped in and only woke up as the a/c accelerated down the runway. It's not meant to be offensive. If anything, I feel safe with the crew and their competence.
S.