Of course they would stop. Not all, but a majority would. Reducing gun availability goes a long way towards reducing mass shootings. Thats simply common sense. When you can buy a gun down the street for a few hundred dollars that makes it extremely easy to come upon a weapon.

An illegally purchased automatic weapon costs about 2000% more in Australia then in US. If you can pay that much more for a gun as a criminal you really dont need to be a criminal.

I dont really care. I dont live in the US, nor do i consider myself a liberal but the gun discussion is the stupidest shit i have heard in my life.
Get a fucking taser, a damn slingshot, your self defense potential doesnt go down one bit and everyones safer for it.

Most people are idiots and most people can buy guns in the US. Enough said.