There are 10's of millions of people who don't know what a seat belt is -- but none live in the West so it's a LCD deal.

My favorite third-world anecdote: World used to fly Hajj charters back in the day. Passengers used to go into the lav and poop on the floor (they had no idea how to use a Western toilet.) Signage wouldn't work as most of the passengers were illiterate.

A mechanic decided the solution would be to paint footprints on the floor facing the door.

Male passengers then peed on the door.