Sorry this isn't the best topic!

We have all seen numerous posts from teachers/tutors posting their students' work online, whether it's amazing or terrible. Here is one I have come across this morning:

As I have blurred out the name, I thought I might add: the teacher is posting this from his personal account, and not his professional/business account.

This teacher is facing some backlash with people saying it's "unethical", "bullying" and even "he should be fired".

As far as I am aware, there aren't any rules on posting work online (as long as identifying info is censored) - please correct me if I'm wrong.

Anyways, what do you all think? Should it be allowed, or do you agree with the people saying its wrong?