As SLF, I don't really care if someone next to me is ignoring the announcements - but one thing which DOES get my goat is when someone near me keeps talking while they're going on.
On my last flight I sat next to a couple who were on vacation, and they would have prattled on had I not asked them to shut up.
I prolly wouldn't have done even that, except the guy was sitting next to the handle.
I find it very amusing that you can speak to an average college graduate these days, and unless the person's major was in some kind of "hard" engineering, you find lots of folks who haven't a clue as to how an airplane flies.
At one point in recent history, traveling by air was nearly magic; now it's so commonplace that many feel it's not even worth knowing the basic science behind it.