I had a long think about whether to post this, because it makes me sound a bit horrid ... which I'm not, really.
When I was at prep school, there were a small group of girls who were really beastly. One lunch time, we got one of them, and one of those long poles for opening high windows ...
We pushed it through the sleeves of her blazer, and hung her up between two cupboards, and ...
(oh crikey, this sounds awful ...)
... we threw things at her.
We didn't get punished at school because, obviously, she didn't dob us all in.
However, her parents found out (torn blazer or some such nonsense) and Daddy went absolutely bananas. But I think he secretly knew that we were in the right.