Eh, I can see some mitigating circumstances here. I went to a lot of camps as a young'un, and they do have rules.
Holli’s mother urged Ms Graves to reconsider but she refused and said if Holli was not picked up she would have to attend all the planned activities but would not be allowed to join in any of them.
It's not like she was going to be turned out onto the street or subjected to corporal punishment or solitary confinement. Of course, without knowing more about the nature of these "planned activities" it's hard to say just how bad this would have been. Mind you, it was the mother who decided such exclusion would be so excruciatingly cruel.
"They had been planning the feast weeks before the trip and Holli was in charge of bringing the chocolate,” she said.
Of course it wasn't drugs, but this certainly sounds like something of an organized operation to purposefully undermine authority. Sounds rather unsavory. It makes me wonder a little if the other kids were also punished.