Yeah that's the thing. No matter what you do, it's bound to be illegal somewhere in the world. Be it North Korea or Iran or Australia. You simply can't follow everyone's laws because they are often contradictory.
It did however deliver the hilarious quote "The laws of mathematics are very commendable, but the only law that applies in Australia is the law of Australia", in regards to end-to-end encrypted messaging.[1]
It went down as well as about you would think it would.
It was a scheme to sell math textbooks involving a purported method for squaring the circle which depended on that incorrect value of pi. Squaring the circle had already been proven impossible, but that didn't stop them from trying.
I don't care about what Australia wants. If I ran a private Matrix instance (e.g. to chat with my gaming buddies) I wouldn't even agree to divulge who is registered on it.
I've been threatened by the governments of Pakistan and Germany for stuff I've said pseudonymously on the Internet. As much as they may think everybody needs to care about their laws, I happen not to.