Information about safety measures needs to be repeated over and over again by law, no matter how easy it seems. It also needs to be easily available, hence the card in the seat back pocket in front of you. Research have proved when an accident happens some people don't remember what they should do. Believe or not, some even forget how to fasten a seat belt. They get nervous and don't think straight. I think it is a good idea to spell out rules and safety measure indications as if the public was stupid because there are stupid people out there. I have ran into some who don't know how to fasten an airplane seat belt, believe it or not. Even after they're repeated all over the place, they still have trouble with it.