I was in J class on a CP flight YHZ-YOW in January. A woman boarded with her under-2 daughter and was booked into coach. Now, CP uses a Fokker F-28 on this route and it's fairly cramped between rows; the poor woman would have had a bad time of it, because the back was full. The gentleman next to me called the flight attendant over and said he would upgrade them with his stickers; after a little argument ("no upgrades once you've boarded" "I'm an Executive Platinum member; I can do this") the FA spoke with the gate attendant (after all, FA's aren't familiar with all the upgrade rules) and arranged for it (J was half empty). The little girl was very well behaved, even though this was apparently the first time the mother (and I assume the girl) had ever flown.

It is the parents, not the children. And the other passengers, too. That EP was a gentleman in every sense of the word.