It is no surprise people are concerned about knives:
* We live in a society where children kill each other, and adults kill children.
* People kill their fellow workers on a regular basis.
* There are violent gangs.
* There is a lot of crime - the prisons are filled.
* The media makes sure we know about all of it. They do it because, we, the public are fascinated by it.
* We also seem to have a fascination with watching people terrorizing and harming each other so it is always in the media conditioning us.
* We live in a society where knives are not commonly needed in daily lives by most people - except to cut their food (most people have scissors, box cutters around, etc.).
* Getting cut by a blade seems scarier than getting shot by a gun. Kind of like getting attacked by a shark is more frightening than falling off a cliff.
* People are not used to seeing other people with knives.
* The knives have become associated more as weapons than tools.
* Some of the knives are designed to look especially dangerous, Rambo-like, etc.
The "sheepie" term is often used in a negative way but the bottom line is most people have good cause not to know how to deal with someone carrying a knife, not to feel trust and not to have warm feelings.