Yes report it immediately! Never take things like this light. Even if its not true.
It's wrong for another to punish your own child, but I think if he was doing something wrong he might've deserved it. It is a slap on the neck and hand after all...atleast it wasn't like across the face. In my opinion, you should just tell the manager that it's become a problem.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.