As for the e world...not that hard if parents set the tone..just like rules at school!
For meals (home or out) our grands know tablets are turned off once food is served.. Of course the grown ups must follow their own rules too.
Sadly, where we live, some casual dining places have tvs on ( sports, news, cartoons) so that is a distraction not easy to escape.
things will quiet down on ships once school starts..which it has in some areas..then it's the hurricanes Carib cruisers will worry about .