This is something that irritates a great deal.
Pax not paying attention to the safety briefings.
Everytime I fly I watch the safety briefings, and I always notice that everyone around me just read books and magazines, chat with each other or look out of the window.
I know one thing for sure, if the aircraft were to crash land or have some sort of incident that requires evacuation, these people could get hurt. And they would likely be the first to complaign about it.
If you ask me, a clause should be brought in on the sales of tickets.
"If you don't listen to the safety briefings and get hurt as a consequence, then tuff sh

t!!!"
It won't happen,..... bit I wish... and I'm just a passenger.