First off, Camberra gives off this as a travel advisory
http://www.smartraveller.gov.au/zw-cgi/view/Advice/Afghanistan
the first two entries are pertinent me thinks...
We strongly advise you not to travel to Afghanistan because of the extremely dangerous security situation and the very high threat of terrorist attack.
? If you are in Afghanistan, you should consider leaving.
The thing being, Australia has troops on the ground, and that makes you a target from the moment you would touch down (and yes, they would know you're Australian because it's on the flight manifest which isn't secure, everyone can get at it, it's a joke really... Even just flying in there is another thing. No commercial flights leaving from Sydney mate..)
So ISAF has a vested intest in keeping civvies outta there. The only western peeps there are either ISAF, Red Cross/Medicine sans frontiers, PSC employee's, dope dealers, gun runners and heroin addicts.
edit: A few NGO and UN people running around as well.
Dude, goto Bali, soke up some rays, enjoy the beach life, have a drink with a little umbrella in it, served in a coconut...
Even Bagdad is safer I think these days.. and I wouldn't advise going ther either.