I think there's a big difference between listening to the preflight and actually comprehending it. I recall one incident a few years ago when a Canadian Regional F28 lost a wheel on touchdown. The captain ordered an evacuation and most of the pax went to retrieve their carry-ons! I can pretty much guarantee that had I been on board those morons would have my footprints all over their backs; I don't mind if they die from their own stupidity (I'd nominate them for a Darwin Award) but I'll be damned if I'm gonna let them take me along.