Edit: obligatory explanation (thanks mods for squaring me away)…
What you see via the UI isn’t “all that exists”. Unlike Reddit, where everything is a black box, there are a lot more eyeballs who can see “under the hood”. Any instance admin, proper or rogue, gets a ton of information that users won’t normally see. The attached example demonstrates that while users will only see upvote/downvote tallies, admins can see who actually performed those actions.
Edit: To clarify, not just YOUR instance admin gets this info. This is ANY instance admin across the Fediverse.
Gpt has to small of a context window to get someone’s entire post history in. U have to embed everythibg they have said then u can make queries against their knowledge base or grouping user content embeddings and comparing to known data points. Not that i have the compute to do this at any kind of scale.