Cyber bullying is an act that let to a lot of emotional torture and I also believe that what that guy did to your friend was not right by sharing her personal information on the school platform
And also claiming she was cheating on him
I must say that am deeply sorry about that
But we all should not forget that steemit is the best social media platform and I believe using this platform, our personal information are safe so let us all enjoy our stay while using the steemit platform