Seems to me that all this would do in my case is identify that I’m likely the same person in the various forums I post on.

I’ve used LLMs to go hunting for me online, and it took a LOT of prompting to link the same anonymous me across more than a few of the most popular online forums, even when I fed it excerpts from less popular places.

Since I use a different voice in my private communications and don’t post to public forums under my real name, there’s very little to be matched.

Matching up multiple Reddit and Instagram accounts? Sure, LLMs can do that with ease.