@lex I'd say that a much bigger issue is that schools generally *aren't* safe/trusted environments for a lot of students, and "your identity and self-expression is tied to a hierarchical organization that holds power over you" (ie. a school) seems like... not really an improvement over the big social media platforms.
It's not without reason that the common advice among students back in my high school days was "don't ever use your school e-mail for anything personal, because the school can read everything".