I was dissatisfied with the teaching methods in a specialist subject at school. I contacted a local charity that specialises in that subject and provides teaching for teachers. I wanted to find out whether what the school was doing was best practice, and how they could improve through training courses. However I must have mentioned the school's name rather than keeping it generic as I wish I had done. Now the charity has fed back to the school through personal contacts that I told them xyz about the school's teaching, and the teachers are annoyed.
Should I have expected a reasonable degree of confidentiality from the charity or am AIBU for dobbing the school in?