It was proposed during a time of tyrannical government. And look at where governments in the world are going today. If you don't agree that they're becoming more tyrannical then you need to wake up. I'm not sure in the situation in AU, but here in the US the government wants to have windows into every facet of our lives.
Yeah, I think it's about time you moved out of Syria.
The government will leave the 2nd amendment alone, it's none of their concern in the first place. Your puny gun won't match a drone strike in a hypothetical revolution anyway.
In the foreseeable future, I can see 3D printers become illegal if 3D Printed weapons become a real problem. Thus, a great technology would forever be lost.
I highly doubt 3D printers will be made illegal. It's just a tool. Much like guns, it's what you end up doing with it that matters.
The only thing I imagine the government could do would be to track downloads of this material, much like the feds do with child porn and such.