Originally Posted by
AllThePants
Coming back from Hawaii recently there was an announcement that family boarding was explicitly 2 adults per <6 year old, and that additional adults had to board according to their boarding number order.
This was the first time I heard this rule/announcement -- but with the very large number of kids coming back from spring break could see them trying to prevent a baby from being a free pass for a large party of adults.
That said -- I could see the 2 kids + grandparents scenario sliding through the gate attendant 99% of the time. And of course -- you could always just save seats -- but that's a whole other topic.

I've heard that announcement many times and I've also seen large groups of people board with a single child, sometime the OA allows it. If I Remember Correctly at one time the rule was ambiguous about who could board with a child, then I think that added parents, but that also caused several incidents where a child was traveling with another relative or non-parent adult.