Every pair of jeans I wore to school in the late 70's/early 80's had the imprint of a Swiss Army Knife in the left rear pocket, I EDC'ed it everyday/everywhere (even had it it my suit pocket when I got married in 1988). It was for cutting stuff, hunting, fishing and opening stubby bottled beers before twist tops.
These are much different times and now that I have kids in school I guess I agree with the strict school weapons policy: it just needs to be applied with some common sence.
Mike