The problem with ZT policies is perfectly outlined in his assessment.

The people doing the right thing (standing up to aggressors) are put down twice over, once by the bully, yet again by the educational establishment. And they don’t actually punish the bully half as harshly. Modern American schools working on the ZT model work much like society actually, further cementing the idea that American schools are very much like broader American society: a sociocultural mishmash of people who do not belong with those who do not deserve to be around them forced to deal with their dysfunctions be they educational, economic or criminal in nature.