If I doxx someone online then it gets indexed by Google, if someone then Google’s the information it stops being doxxing?
I’d assume most doxxing isn’t done by someone who has unique firsthand knowledge (e.g. “Oh I know John, he lives on so and so road”) and instead is done by finding the information online whether via Google or a different public source.
At least in the US, where a ridiculous amount of private information is deemed “public”.