Amateur police would totally stop mass shootings...

... claims amateur politician:

"Isn’t it interesting that the tragedy in Paris took place in one of the toughest gun control countries in the world?"

It was crassly insensitive enough to Tweet this after the Charlie Hebdo attack, regardless of whether or not this individual, or one of his his staffers, actually intended to repeat the wisecrack after Friday 13th, but let's not think about the hurt this loud-mouthed pig has caused.

Let's think, instead, about the implication that gun controls get in the way, because to stop the bad guys with guns running amok, you need the proverbial "good guy with a gun." How's that theory been working out in practice?

Attempts by armed citizens to stop shooters are rare. At least two such attempts in recent years ended badly, with the would-be good guys gravely wounded or killed. Meanwhile, the five cases most commonly cited as instances of regular folks stopping massacres fall apart under scrutiny: Either they didn't involve ordinary citizens taking action—those who intervened were actually cops, trained security officers, or military personnel—or the citizens took action after the shooting rampages appeared to have already ended. (Or in some cases, both.)...

...For their part, law enforcement officials overwhelmingly hate the idea of armed civilians getting involved. As a senior FBI agent told me, it would make their jobs more difficult if they had to figure out which of the shooters at an active crime scene was the bad guy. And while they train rigorously for responding in confined and chaotic situations, the danger to innocent bystanders from ordinary civilians whipping out firearms is obvious. Exhibit A: the gun-wielding citizen who admitted to coming within a split second of shooting an innocent person as the Tucson massacre unfolded, after initially mistaking that person for the killer, Jared Loughner.

James Follman

Short version. There seems to be no evidence that having some random "good guy with a gun" on the scene stops armed bad guys. There is evidence that having a "good guy with a gun" running around during a shooting spree can hinder the armed professionals who are trying to stop the bad guys and puts potential victims at even greater risk.

Take a few moments to think about it and the wise guy doesn't sound so smart (not that mere thought will stop members of the insane clown posse impressing people with Twitter-sized attention spans with this kind of nonsense).