You can't see it very well in the video, but there were numerous large screens set up at the festival. A scroll for lost children rolled across the bottom when a lost child was found.
One woman's child was in the "Lost Child" tent the entire three performances. She probably figured, Meh, I know where he is....free babysitting, I get to see my name in lights, AND I'm not losing my place in the beer line!! It's friggin loooong.
I would wonder about the child of that woman.