The video translated into 3 languages (Chinese, English and Japanese) went viral on the Internet.

Also, the netizens doxed (起底) him, his personal information was exposed, include his name, address, phone number and school which he was studying. The school received a lot of emails requesting punishment of the student and even expulsion for the him. 

The teacher was worried about the student, because the cyberbullying already affected his real life   

All humiliation could erode self-confidence and feelings of self-worth of the victim.

Why could it be harmful?