Currently, almost anyone in the Fediverse can see Lemmys votes. Lemmy admins can see votes, as well as mods. Only regular Lemmy users can’t. Should the Lemmy devs create a way to make the votes anonymous?
There is a discussion going on right now considering “making the Lemmy votes public” but I think that premisse is just wrong. The votes are public already, they’re just hidden from Lemmy users. Anyone from a kbin/mbin/fedia instance can check out the votes if they are so inclined.
The users right now may fall into a false sense of privacy when voting because the votes are hidden from Lemmy users. If you want to vote something and not show up on the vote list, please create another account to support that type of content and don’t tell anyone.
What you upvote/downvote, when you upvote/downvote. With some database queries, they can also read DMs that are on their server (i.e. if you message someone on my server).
You can see who upvoted a post by putting the URL to the post or comment into any connected mbin server and clicking “favorites”. Downvotes are restricted by default (but admins can see those of course).
The only information admins can see is the information on their server. For Lemmy, that means a server would need to be subscribed to all communities you’re active in for that information to be available. If you want I can DM what upvotes of yours my server knows about.