PRAM announcements are universally ignored IMHO. They are a curse. One thing we all may forget on this topic is the old adage that always comes back to me, it's never been proven wrong. No matter how smart a passenger is, once they get a ticket, they lose 10-20IQ points, a boarding card takes another 20IQ points off them!
I bet even Albert Einstein would have made a fool of himself flying.....
It really brings the worst out in most folks...