Another angle is kids who have been given a tablet as a pacifier. Their parents are often on autopilot, having checked out months or years earlier.
On topic (and discussed already on HN): https://github.com/Pankajtanwarbanna/stfu
When young children are on airplanes you cheat in whatever way you can.
Tell me you don’t have kids without telling me you don’t have kids
I'm not a fan of the tablet as a pacifier approach but it's not my business. What is my business is when the parents do so without providing a way for the child to indulge without annoying everybody else. I consider that to be absolutely unacceptable in that if they can afford a tablet they can afford cheap headphones.