Let's read it carefully on where they want to ban it.
They ain't the world government to do that kind of ban on different websites or forums. But if that forum is especially made for Australians then I guess they should abide by that law.
This movement will actually be not easy to implement. First, they also added the social media and online platforms. What? Tell Facebook and Twitter to stop the advertisements of gambling on their timeline. I don't think that is going to happen unless there is Facebook Australia and Twitter Australia only.
They should discuss this with the internet services to block such advertisements during the time given in the report.
The other recommendation can be done by their government but it will also be an intense fight for them.
But I do think this is going to be hard, I mean, some of them are not the gambling sites doing anymore, there are those who are looking for referrals that might flash the ads in some articles or blogs.