Before the law was recently changes, many classes of knives were illegal where I live in the State of Kansas. I found it strange that I was licensed to carry a concealed firearm, but I could be in violation of the law due to a knife I carried. Balisongs are unique in that some skill is needed to do the various tricks and doing so as a demonstration of handling skills may be considered as brandishing a weapon. In Kansas, the old law was strangely worded and may have been based on reactions to tools used in violent crimes. I guess they could make spoons and toothbrushes illegal since they are sharpened and used as weapons in prison. After a change in the Kansas political climate, the laws were relaxed and the remaining strange prohibition is against throwing stars, which makes my Ninja garb useless.