When Did We Get So Rude?

Ghost Writer goes off on the loss of common courtesy in the average airline speech.

So as a fixer of things, I fly often, sometimes twelve planes a week, and usually on a regional aircraft. I don't talk over the flight attendant during the announcements I've heard hundreds of times. Inevitably, in spite of the flight attendants plea for attention, people are yapping. The louder the announcement. The louder the people.
I want to shout, "SHUT-UP! You're being rude. Didn't your mother teach you better? (And my mom's favorite) Were you raised in a barn?" When did we lose this common courtesy? And is it a symptom of the erosion of civility throughout our society?
So please, be quiet during the announcements, folks. Make some eye contact with that potentially bored flight attendant, or count the seats to the exit behind you - it might save your life. And really, you're snuggled up like a sardine next to that person for the next 60-180 minutes. Whatever you were talking about before the announcements will get said. You've got plenty of time.
My next installment - When Did We Get So Stupid? The airline speech as a sign of an illiterate America rising.