If violence is organized through a phone call, is that the fault of the phone manufacturer or the phone service provider? If violence is organized through the u

If violence is organized through a phone call, is that the fault of the phone manufacturer or the phone service provider? If violence is organized through the use of protest signs, is that the fault of cardboard and marker manufacturers? Heck, why not just go a step further and say that it's the fault of "language" and ban all forms of that. Ironically, when someone goes and shoots up a school... we defend the gun manufacturers as simply producers of a tool. I see, but Facebook, which is clearly just a tool for communication, is surely at fault here. I don't get people.