Was this a sanctioned AMA event?

Does it matter?

Were leaflets passed out to all participants including spectators, explaining how important it is to clear a field or runway when a pilot makes an approach to land his aircraft?

Did any individual or principal have a bull horn?

Active PA system?

I read that two passes were made. But this isn't really an issue.

Here's what everyone is missing or not giving enough thought to, and the conversation should be focused on this.

With that pilots first pass, the field and runway should have been cleared immediately. And without question or hesitation.

You would have to be a pilot, with training, to really understand this. Probably "one" of the reasons the conversation is all over the place.