They Showed This To High School Kids In 1948. Would They Allow This Today?
https://www.youtube.com/watch?v=8AGpILvdwDM
Maintaining Classroom Discipline (1947)
https://www.youtube.com/watch?v=j9TWBV_gKf8
Watching that video, as one of the commenters said, Where do you go to get the facts?