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.
Ok, sure. But the difference is that I can’t make my own Reddit instance and then see all Reddit users IP addresses.
What is the vetting process of getting an instance federated?
Like if I was an authoritarian henchman, could I make an instance with a community about cats, get federated, then see all the IPs of users calling my boss a pooh bear, on all other instances?