Not to argue with your point as a whole - that apathy that leads to risk to others is a bad thing - but...
Yeah, I've looked at the pamphlets on the hundreds and hundreds of flights I've been on. I've sat in the emergency row, first class, back galley, you name it on dozens of models of aircraft.
Within a few moments of taking my seat, I know where my nearest exit is, and I know how to open it in an emergency because nearly all commercial aircraft doors open the same way. I know from a quick reach-under that the vest is still there, and that they're designed to be of obvious function with their large handle for self-inflation and the tubes for manual inflation.
I don't need to be told to grab for an oxygen mask before it falls - I would posit that it's instinctual, even as a parent, so that I am better equipped to help my fellow passengers (or my kids if they're with me) and so that my action can set an example for those that don't know what to do. All the seats of all the planes I've been on in the past ten years or so have been able to be used as flotation devices.
I'm not saying that these things are common knowledge. "Noobs" should listen. But "veterans" shouldn't be assaulted with high volume, or assumed to be shirking their duties as fellow passengers if they respectfully mind their own business during the safety announcement.
Talk during the announcement? Shut the hell up, you're messing with the learning of someone else, and you're going to cause others to talk over it. Quietly play Bejeweled while wearing headphones during the announcement? I'll assume you've "been there" and "done that" often enough to not be a liability to the rest of us if something goes wrong.
Incidentally, when told about the exits by the flight attendant, do NOT ask "in the event of an unexpected landing event, am I authorized to escape via the twisted, burning, gaping hole in the aircraft?" They don't find that amusing.
