In terms of splitting families, I was a passenger on Ryanair yesterday. The aisle seat was occupied by a child of 8 or 9 years who flopped onto the tray table for the whole 3 hour flight and was very difficult to wake up when I went to the toilet . He appeared drugged, to be honest. I've no idea where his family were and they didn't visit him for the whole flight.
IF there had been a serious emergency involving an evacuation one wonders what would have happened.
(the other thought that occurs to me after the event is that he may have been a victim of trafficking, he really was doped out...I wish I'd brought it to the attention of the cabin crew)