At my university, there is a lecturer who uploaded a student's final year project to his own social media account and criticized that student's English level. I am wondering, is it appropriate for that lecturer to do that? Should that lecturer be punished?
Student work can, ethically, if suitably anonymized, be used for some purposes. But I worry about using social media. If the purpose were to somehow embarrass the student it would clearly be wrong and, hopefully, subject to sanction.
But, excerpts from student work can be used (anonymized) with an educational purpose to instruct others, students or other instructors.
It is difficult to think of social media, unless in closed/private groups, as being an appropriate venue for this, however. An investigation might be needed to determine if ethical boundaries were breached.
And, it is more than an issue of etiquette, but one of ethics. Criticism of student work should be shared with that student only unless precautions are taken to protect their privacy and reputation.