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.
Yes, you do have to be an admin but you can be an admin on ANY federated instance, which is a piece that most people likely won’t consider. Admins aren’t an elite group of hand selected staff with background checks. I’m just some shmuck who knows how to format a proper docker compose file and query a database.