Maybe there was another broadcast; I did watch the one you posted. All I saw was a very upset woman trying to hold it together. I imagine her opening the blinds in the morning in the house where she lives alone, seeing stuff in her yard and thinking "OH MY GOD, SOMEONE WAS IN MY YARD DURING THE NIGHT!" She calls the police who come out and say "Lady, it was a prank sponsored by the school" and she's embarrassed because she called the police and then she's pissed. Then the press gets a hold of it and wants a statement. In the video I watched, she is shaking, looking a lot more upset than angry. Then it's time for the Internet to hammer her. She eats dogs for dinner when she can't catch children, etc ... all because she was upset that people were roaming her yard in the night.
OK, so maybe it didn't happen that way and she is the Wicked Witch of the West (movie version, not Wicked version), but I understand her position. What happens when someone goes OmSig on those kids? I like to think I'd be more understanding of the prank after the fact, but if someone is roaming around on my lawn while I'm sleeping, I'm not going to be happy. (In an only distantly related story, Serena Williams went into lockdown
when a unannounced man showed up on her property at 6AM.) I can see the fun of it but it wouldn't hurt to get an advanced OK both to prevent reactions like this one and to ensure the kids are ok. She would probably have been within her rights to trash all the stuff, costing the school $100 instead of making $20, but there is no mention she did that. Maybe she's only the Wicked Witch of the East.