Zero tolerance is an expression of anger or dismay masquerading as a policy. It does not say anything about what is to be done, but merely invites people to feel cross.
I blame Thatcher. Whatever we think about that prime minister, supporters and opponents must agree that she had a unrivalled capacity for indignation. Did any politician ever feel so cross about so many things? If her indignation did not bring the expected results, then it was time to feel more indignant yet.
In truth, when Tolerance is banished, Wisdom and Compassion blush for her and retire in solidarity with their sister.
Zero tolerance campaigns: Why do we put up with them? (Jack Dee)