When I was at school, my sisters year had self harmers (mostly girls) who would swoon around with scratches on their wrists (nothing actually ‘harmful’ - more melodrama) and my year had goths.
Our eldest sister - fashion was for denim denim and more denim, my brother - long hair and distressed jeans, another sister - David Bowie and glam rock.
These were the tribes du jour.
School wasn’t handing out razor blades (or rather pencil sharpener blades), perm lotion, or black eyeliner.
Why are teachers now so involved in the lives of the children they interact with for a few hours a week (in a group). They aren’t therapists, psychologists or the parents of these kids.