Will it really change anything?
I doubt this will really affect pirated downloads.
There's a group of people who just like the ripping culture, and they'll just feel better about themselves downloading a copy of the BBC One stream from distant servers rather than the local copy.
Also, corporations have a habit of responding to a situation but then getting it wrong in some way that spoils their entire effort. Is there any chance that the Australian version will get plastered with a really annoying DOG or some other unwanted addition, including advertising or trailers for other shows?
And what is the resolution and bitrate of the Australian streamed file? If it's lower than whatever goes out on BBC One HD then, again, some people will skip it in favour of downloading a ripped copy of the BBC1 HD stream.
Still, let's hope the servers hold up better than the ones NBC used to stream the Olympics live...