Well I think we should correct that Dave. Rifles haven't been banned in Oz, I own several rifles and shotties. The "when guns are outlawed, only outlaws will have guns" statement, while mostly just emotional NRA claptrap, does have a ring of truth. (any law abiding citizen who keeps their guns when they're banned will be outlaws, technically)
Over here, our outlaws (1% bikers, violent criminals, ethnic thugs involved in family feuds etc) quite often take potshots at each other, mostly drive-by's where the house and cars get sprayed with bullets, but there are very few injuries. (Oz only has a murder rate of around 200 annually, and most of them are the result of domestic disputes. By comparison, cigarettes kill around 20,000)
As is the trend in Britain, Europe and the US, most of the mass killings involving guns are not carried out by "criminals" per se, but nice normal registered gun owners, many of whom have never had any previous problems with the law. I'm more worried about law abiding citizens than I am criminals, criminals are a lot more selective about who they shoot at.