I thought the super heavy handed approach never worked at all back then and I still think zero tolerance does not work. These schools go to great lengths to crack down on something that might not be happening is pretty absurd.
Having a drug town go around a quiet campus just to catch that one girl who brought a single ibuprofen, or suspending the kid who brought a plastic butter knife simply because its knife, or calling the police and suspending a kid who brought scissors for art class. I mean it is just overkill, and most of the "problems" aren't really problems at all.