These sorts of threads are commonplace. I will not say whether JQ´s policy is good or bad - am not an expert. But I understand the need for policies. Every fare and carriage is subject to a million provisos. Yes, they are hidden in the ¨fine print¨. But only because there are so many. It would have been ¨nice¨for the children travelling here to have their conditions highlighted, but really ALL conditions need to be highlighted. I book up to a hundred flights a year. I never read the conditions. But that is because I get away with that bad practice as I have no special circumstances.
People on this thread bag the Jetstar criteria and rules. But without ever actually knowing them all nor bothering to understand why they exist. Jetstar may be a small LCC, but they consider these things deeply. Far more than internet chat groups. If someone has a fail safe way of discerning who is an apt junior pax to convey, please share such info in the thread.