I m not a criminal mentality. As an example, in Pennsylvania, it is a misdemeanor to possess any knife or cutting instrument on school property. There is also a law in Pennsylvania which disqualifies persons convicted of any one of a long list of crimes, from possessing, using, manufacturing, controlling, etc. The list of crimes runs the gamut from murder, rape, kidnapping, arson, robbery that also includes the misdemeanor of possessing a weapon, meaning any knife, on school property. Pennsylvania is not unique in this regard.
Similar legislation exists in many other states.
Attend a PTA meeting or a high school football game with a small folding knife in your pocket or handbag, or even a tiny knife on your key chain, and you are subject to the same legal disqualifications meted out to murderers and rapists. By the way, if you read the entire text of the Pennsylvania law regarding weapons on school property, it merely advises that a breach of the law is a misdemeanor and makes no mention of the other law listed somewhere else which sets forth these additional and somewhat harsh disqualifications. It should also be observed that in many instances, several different laws of any given state that might apply to the possession of a knife were enacted decades apart. Remember that adage about making laws and making sausages are two activities that should not be observed by the consumers or the electorate. Laws are also changed or amended from time to time.