http://www.moe.go.th/en/: there must be statements about the minimum level of professionalism that is expected on the part of schools when they hire teachers.

Are the parents who send their children to that school aware that the school hires paedophiles, retards and incompetent teachers? I would say that a public debate about that serious threat to the safety of children should involve the Ministry of Education, Ministry of Justice/Law Enforcement, and mostly the parents.