Fox News has an interesting op-ed on zero tolerance by ifeminist‘s Wendy McElroy.
The punishment for possessing an obvious toy became the same as for possessing a real weapon because zero tolerance means zero distinctions. Zero tolerance takes discretion and evaluation away from educators and mandates responses that can be wildly inappropriate. Behavior that used to be corrected by detention or a trip to the principal’s office now receives suspension, expulsion or even police involvement. What used to be the last resort has become the first and only option.