As my dad used to say, "It's all fun and games until someone loses an eye"
Another video has the same issue: a teen didn't understand just what she was doing. She's a little younger, so it's forgivable that she didn't anticipate what would happen. She's old enough, however, to accept that adults tend to set rules at their businesses for very good reasons, just like schools can't tolerate vandalism. These children have to grow up sometime and learn a concept called liability.
"When I was a child, I spake as a child, I understood as a child, I thought as a child: but when I became a man, I put away childish things."