> He says the legislation is just an under defined word salad

This might be on purpose. I've heard many say online that this law is sold as "save the children" but is designed to be used to get everyone to provide ID when they go/public/message online.

> He can’t even advise if some video game developers he represents’ multiplayer games are exempt from the ban

Bad for video game dev's business, and great for lawyers! The interpretation of the law will get clarified by many lawsuits (costing businesses a lot).

>I've heard many say online that this law is sold as "save the children" but is designed to be used to get everyone to provide ID when they go/public/message online.

Because this was attempted already, for example with the UK "porn ban" law. And Australia is one of the few countries that are even more batshit insane when it comes to policing and controlling its own population, and possibly the only country where such a law could pass now.