A barrage of text messages sent by a parent to a teacher in a scene in "Teach You a Lesson" felt familiar to many viewers. "U-jin’s self-esteem is falling, so don’t make him do math in front of the class." "Please don’t mark incorrect answers with a slash on U-jin’s spelling test. It’s affecting his self-esteem." "Please always take my child’s side in any conflicts with his peers." The character of U-jin's mother starts by sending complaining text messages, but goes on to take issue with the teacher’s clothes and way of speaking. She digs through the teacher’s social media accounts and pries into her private life. "My husband is enraged, so watch out," the mother says before filing a child abuse complaint. For many viewers, it was horrifying to watch, but many teachers said the drama was an almost exact enactment of reality. Some said they failed to finish the drama because it was too painful. A few recounted experiences with parents that had caused them trauma. Unlike in "Teach You a Lesson," however, there is no Korean Educational Rights Protection Bureau in real life t