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.
Agreed. I think it’s fair to say that most people will consider the fact that their instance admins have access to this data.
What many probably won’t consider is that ANY instance admin across the fediverse has access to much of it. It’s near-zero cost to become an instance admin so the potential number of people who have access is limitless.