In Australia, the govt didn't "sit and wait".
They tried to pass a gun ban; Tasmania told them to eff off, so the ban failed.
Before long, there was a setup by unnamed presumably govt entities, appropriately enought in Port Arthur, Tasmania. Pre-positioned refrigerated mortary truck on the scene, a "madman" whacked a bunch of people, and - PRESTO! - nationwide call for a ban.
Very hincky scenario; I know that many high-up Aussies are convinced it was govt setup; one guy believes the CIA was involved, in an advisory capacity.
One cop, Andrew MacGregor, has looked into this; link:
http://www.hiddenmysteries.org/conspiracy/conspiracy/parthur1.html
There are some who believe this was a trial run, prepping for USA gun ban.
.
Mmmhmmm. Mmmhhmmm.
I really need to buy stock in Renyolds.