Dd2 is 12, in year 8.
Dd1, her adult sister does a job that involves her having public social media accounts. She has been getting really nasty comments and dm’s from a group of at least 3-4 girls who go DD2’s school. There are some anonymous /private accounts too that could potentially be the same.
Dd2 hasn’t been mentioned in any of the messages so I don't know if they even know dd1 is her sister or if they just found dd1s account randomly (they have a different surname) She’s having no problems directly with any of the girls in or out of school.
Dd1 obviously isn’t bothered by the messages, it happens often and she is adult and can ignore them.
But I’m concerned with the things these girls are saying, especially inappropriate and offensive things for their age and with Dd2 being in school with them.
WIBU to involve the school and expect them to do something? Or is this not their responsibility?