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.
I don’t mind this, but what about my email, is that also publicly available? What about my password? I had to give my email to confirm my sigup to this instance. It would be pretty shitty if my email was up for grabs now. Think of the poor idiots who use the same password for every service they use.
You email exists only on your home instance, where you signed up. It does not get federated. Same with you password, which is hashed.
What you see in the picture is a database query. Only the admin of the server can see this.
Key point… not THE server, any federated instance server. This activity is available to admins of any of the thousands of servers in the federation.