On one holiday, the kid in front of us was scrambling about. Shouting, trying to climb over the seat back. The parents ignored the kid and had nothing to entertain him. It was a trying flight.
On the way back there was a toddler adjacent. The parents were so engaged and lovely. They had toys, colouring books etc. Did not have a moment's disruption.
You can't punish all families because of the shit parents.
Besides its not just economy, short haul business class I had two unattended kids behind me about 8 and 10. Fighting, shouting, kicking the seats. I thought they were travelling alone. No kids meals booked and the FAs had to be quite involved in explaining the food options to them.
They got steadily more disruptive and at hour 4 of the flight they were both lying down across the two seats and the divider section slapping, hair pulling etc shortly before descent, I turned round and firmly told them off. They then sat like angels till landing.
Their parents were seated together about 4 rows back. I had actually noticed them previously because they were drinking heavily and in the end the cabin crew handed over a bottle of champagne rather than run backwards and forwards with glass after glass.
Crap parents aren't confined to economy.