The "Point" author acknowledges that some schools have "zero-tolerance policies," but he or she is critical of them because they do not address the reasons why the students behave the ways they do.
What is the reason?
First, zero-tolerance policies are those that prohibit some irrational attitudes by the students in schools. The author of Point acknowledges that these methods are used by some schools to prevent ill behaviors but he does not approve of them because they do not address the origins of the students' behaviors.
He believes that a better approach to solving the issues is identifying why the students behave the ways they do.