Essentially, I’ve said I would not re-enter teaching (that is, subbing, which I did 2004-2007) because I would feel pressured to prove I could protect students by being armed. Some of this goes back to my problems with discipline when I worked as a sub. Then recently consider the student at UNC-Charlotte who gave his life throwing himself on a crazed gunman. There is a presumption that manliness requires that any man be able to step up to do that, or he doesn’t belong in any position where others count on him to protect him. Then maybe he doesn’t belong at all, he’s a mooch.
(At one sub assignment in the spring of 2005, a teacher was arrested for having a weapon his his car on the school lot.)
Another twitter user on the far right just tweeted "you're dumb" to me and I retweeted. But frankly only very highly trained personnel could safely try to use a firearm in a crowd of students to defend them. And school security should be much better against lone persons or students -- against a foreign enemy ("Red Dawn" movie scenarios) that's another matter.
The latest on the STEM Highlands Ranch, CO is here. One of the suspects is a juvenile female.