Many Klingon weapons are featured during the Star Trek television series, and the characters display a reverence for them, much like a Japanese sword master would have for a fine piece of craftsmanship.
A good traditional Japanese sword will slice right through you if you bump into it lightly, but the Bat'leth is casually strapped to the back or hung to the wall. In "Ethics", Worf's son Alexander is seen walking down the corridors casually flipping around the dreaded Hegh'bat ceremonial knife.
Klingons value courage, but they are not stupid. So what gives?