What if everybody had a car or a knife? Business does not protect itself from criminals; society places taxes on themselves to hire people following emplaced laws to capture and prosecute the people who break those laws. Their was a report awhile back stating that 20,000 people in California had weapons who were not allowed to own weapons. What are they doing about it - nothing, $8 buck an hour people do not put themselves in that type of risk (to attempt the removal of a gun from someone not committing a violent crime) and the tax base is unable to afford more. So far, California has not self-destructed into a blood bath yet.