Airlines banned smoking because some people were offended by it. They take issue with the exceptionally voluminous because some people are offended. Drunk? No, some people are offended. Anything can be banned if some people are offended.
Now children are offensive. Planes are to have no children zones, specific areas where you must go if you indulge in the lifestyle choice of parenthood, and soon airports will have special outside children's areas, next to the smoke zone, the fat zone and the booze zone. It will be illegal to have children, or to allow anyone else to have children, in any public building. Eventually this will include schools and maternity wards. It's for the... oh.
It's true that some, not all, children are rabid little brats who should be hog-tied and gagged and made to travel with the luggage, but in most cases that's because their parents aren't allowed to control them any more. One smack and it's child abuse. One raised voice and Childline is on the case. Yes, we blame the parents, but the parents are indoctrinated with the PC notion of not stifling self-expression and are legally forbidden to control their Hellspawn anyway. Some kids really do need a smack to delineate their boundaries and that's not allowed any more.
So we see harassed parents trying to look lovingly on as little Tarquin expresses himself by running up and down the plane aisle knocking over trays of food and drink then squats down and drops his load on the floor because banging on the toilet door failed to dislodge the current occupant within ten seconds.
Annoying children are a symptom, not the original cause. That lies with political correctness in a culture where children are everything, where discipline is disallowed in case it stifles the development of these prototrolls, where no child can be told they are doing something wrong and where there are no boundaries.
Let the parents, stewardess and passengers whack them, once, and they'll sit down and shut up.
They might even grow into decent human beings as a result.