The teacher deserves the same treatment for as many times as he did it in the past. You can be sure that wasn’t the first time.
until teachers in Thailand think they are Gods, nothing will ever change.
Not that the taste of his own medicine will change anything, but it will serve an example to others.
unfortunately, the powers that be are all on the same page as the offender.
And then Thailand wonders why it’s still consider a third world country.