This was the generally accepted approach nationwide in the past, until we realized it fuels systemic transgenerational inequalities, a bit like economic, racial, residential, etc. forms of segregation.
Putting a hooligan amongst decent people works, but only of the decent people can force the hooligan to behave. Most of the time, it works by just peer pressure, even in the positive sense. But for those who don't yield, a society at large has police. And a classroom does not have police.
So a teacher has a choice: to be a saint (and do miracles), to be the police (with hands tied though), or to be a victim. Sadly, many end up with the third option :(
