Design is Dangerous

Design, while also thought of as being helpful to society can also end up being dangerous to society.  The design of knives can be thought of as dangerous, because the edge that cut things are very sharp.  As a tool, the knife is very helpful to society because it aids us in cutting things that we wouldn't be able to cut without its help.  For example, the knives used in the kitchen are very useful for cutting up food into smaller pieces.  It is dangerous, however, because if one were to slip with a knife, the consequences can be painful.
At the same time, I think knives were not intentionally created to add more danger to the environment, but only to be used as aids.  Because of this, many knives have warning labels attached to them in some way, either in the packaging or in the box.  In the same way, the danger that knives carry as a design is increased by the intent of the person holding the knife.  Obviously, someone with murderous intent would be much more dangerous wielding a knife than someone who just wanted to cook dinner.  In that way, knives are only as dangerous as the person holding them.