I was rooted by gravity and physics to one location at a time. I could not protect everyone. Despite the generally local presence of police, people must continue to protect themselves to a great degree. In short, I do not think that Andrew Schep built a solid case for gun control either biblically or practically. Some areas of the nation are safer than others.
Some people pool resources to hire extra security guards and install sophisticated alarm systems.
The whole arguments boils down, on every level, to responsibility. We are responsible to protect ourselves and those under our charge. We must use any devices of self-protection with caution and responsibility. Fear should never motivate us to dodge our responsibilities. Wisdom says that our responsibility to protect cannot be wholly delegated to anyone outside ourselves.