I was thinking along the same lines. Isn't it just doxxing? Going deep into someone's online history and making hypothesis about who they are in real life, then publishing their name and what they do?
I don't know of any law against it except for specific populations like law enforcement and even those usually have exceptions for journalism.
So the real truth is "it depends". ¯\_(ツ)_/¯
The right to privacy here never meant "noone may know that I exist".
https://parlinfo.aph.gov.au/parlInfo/search/display/display....
(nice permalink URL guys.)