Are Knife-Resistant Dockers in Your Future?

Japanese schools must be tough environments:

Protective fibres woven into bulletproof vests for United States troops in Iraq are being put to the test outside the battlefield -- by Japanese schoolchildren.

Madre, a Japanese security firm, said internet orders in Japan have been trickling in for knife-resistant sweatshirts and windbreakers it makes for children.

This makes me wonder: will knife-resistant soon crowd the marketplace?