I'm very saddened to see a tragedy like this and maybe more saddened to see the press frenzy afterwards. While I am extremely pre gun control I don't want to jump sown the rabbit hole of that debate.
The sad thing is the sensational press tends to get reactions like HPA's who react to singular events as if they were a clear and present danger in their lives. Arming teachers will not solve mental illness. So rather than arming each other to the teeth or take every ones guns away why not address the root issue, getting crazy fuckers the help they need before they blow some ones head off.
Read Culture of Fear by BArry Glassner when you get a moment , it's an eye opener.