It doesn't take a gun to kill.
If this were a serious attempt at preventing a killing spree, the focus would be on people and not guns.
If one is he!! bent on rampage, (illness or not) it certainly doesn't take a gun or guns to follow through.
Reference Oklahoma City, 911, or for all that matters, the Boston Strangler or Bundy.
South Carolina’s trying “the opposite way”: the leg is pushing for a “bill” allowing concealed cary permit holders to own firearms on school campuses. Which would really make it safer from the “massacre” types..IMO
If you're not particular about who gets killed, driving a car into a street fair at 70 MPH is pretty effective too. That just happened in the Washington D.C. area within the last couple weeks. Witnesses on the scene recognized the driver and observed that she appeared to be sucking on a crack pipe as she drove into the crowd. The death toll was close to 13 people.