Here are some things to think about:
-Most kids that require this sort of discipline do not get it at home.
-A majorty of these kids also have zero respect for authority figures
-Both of these can tie in with parrents who make excuses for their kids, blame others, or just don't care.
Asshole kids usually have asshole parrents.
When I used to play football a coach could get physical with a kid. In today's world if you touch a kid's facemask you will be on the 11pm news as abuseive.
We are raising generations of weak, fat, and lazy kids but nobody seems to care.