My 12 y.o. child is on a message group chat with friends at school. I keep a general eye on it (with my child’s knowledge) and it’s in the main harmless chit chat and posting silly YouTube videos. I have spotted a really offensive message from one member of the group about another child in the year who is not on the chat. My child and another called them out and said they should delete it, but it is still there. I am debating messaging the mother of the child to flag up that she might want to keep a closer eye on what her child is posting but part of me thinks perhaps that would just be busybody behaviour. WIBU to message her?
YABU - mind your own business
YANBU - message her