The helpful CC aplogised and said, "I know from bitter experience that if I tell the parents to mind their children - I'll get a great mouthfull of abuse"
That sounds about right. Parents like that don't seem to like being told to reign their children in though many dare not say it your face and will instead wait until you're out of ear shot. Either that or they will say something like "what do you expect children to do on a long flight" as though it's yours and every other passengers fault.