If I had seven to eight beers and that many shots, got into my GMC truck and while driving home, ran over and killed your kid, would you tell GM to stop making trucks or the brewery to stop making beer? How about if I were high on drugs and T-boned your daughter's car, killing her? Would you tell the drug company to stop making medication?
Use the same rule of thumb when dealing with firearms. It's the human factor that did the killing, only the projectile was changed. Have the schools take down those signs, "Gun-free zone." Every shooter knows that no guns in a school means 20 minutes of free shooting.