Oh! I have an idea for your "murderS" ^^
Actually, you just want they don't go to Australia, don't you?
So you don't really needa kill them, but just make they can't go... or don't wanna go to Australia.
Here we have a solution!
The Sharing! It's a good place, you'll see. Once they'll be with us... in our association... they won't go anywhere, because it's so cool they'd be sad to leave one year to Australia! So please give them the phone number and address of the Sharing, or introduce them to us, and we'll do what we can to keep them ^^
Isn't it a good idea?
Of course, you also can come if you want. But maybe you prefer to go to Australia ^^