I think, far more effective if they disarmed themselves
What the U.S. Navy said at building 26 made far more sense with the active shooter situation in the building: "Run, Hide or fight". Not everyone has the whatever you want to call in to confront a killer, nor the means, nor the opportunity, but when has the means. opportunity and can muster the courage, than it only makes practical sense as regular armed law enforcement is rarely at the right place and at the right time (no fault of theirs unless you want a ruinously large and oppressive police state)
Lt Dave Grossman (Wrote On Combat and other greats) divided people accurately into the ability and means to defend themselves and others into: Sheep (most people, and not necessarily a slight intended), and then Sheppards (like Capt Nichola Goddard), and Sheep Dogs. And, then there are the "Wolves" Hopefully no explanation required
As Dave quite eloquently put in one of his lecture presentations when he said of the people who go towards the shooting, rather than away from it, they don't do it or glamour or glory to protect people they perhaps don't even know. "they do it for love" or also well put in the U.S. Air Force Motto simply "Send Me".
Practically speaking one needs to reduce the odds of the Wolves and increase the odds of the Sheep, Sheppard and Sheepdogs and hoping that an armed Government official will be there in time to save any of us is naive, reckless game of Russian Roulette, that we will lose, - most of the time anyway. It a matter of odds and luck, nothing more or as Clint Eastwood put quit well in "The Un-forgiven" : "Deserve ain't got nothing to do with it". Despite use of "ain't" he had a really good point
. We reduce these odds in Society's favor by allowing the training and equipping of those willing and able. Why because of what I believe Heracles said many years ago, which really applied to people in general, not just soldiers. I paraphrase here
"out of 100 (I would said both men and women and sadly, occasionally 15 year old boys like Zaevion William Dobson, in Knoxville Tennessee on Dec 2015), 85 of them are just targets, 14 of them are real soldiers (sheepdogs), and one is is the person that could bring you all back home (The Sheppard)
To reduce that 85% figure (On Jesus, really? Really), there not only has to be a proper train and equip in a true democracy like Canada - "a country of the people, for the people" - This is not just an American Abraham Lincoln Aspiration but an International one the world over in what we all strive to achieve in a true democracy
If not we need to see more needless predations by "wolves" in society no matter how hard we try to "scrub the truth", as we try to imagine as world of no bad people or guns, just "bunny rabbits and noodle salad which are known by dangerous dreamer to exist on the Planet Zontar, home of the cabbage people"
As Clint Eastwood put quit well in "The Un-forgiven" in any of us are unlucky to be slaughtered by a crazy, fall out of our crib, - sometimes on Parliament hill, get run over, die of cancer or disease or whatever: "Deserve ain't got nothing to do with it". People that refuse to accept they fundamental basics and pitfalls of human condition, which is indeed mostly good, are dreamers, fool and natural victims. Please just don't drag the rest of us into your own "pipe dream"
Never guess the above was coming when I Woke up this morning!