It should be noted that anyone can set up a Lemmy server and track votes already. For instance, for this post, I see this screen:
This is available for both comments and posts. The database itself contains even more details, such as time and date of when the server broadcast the vote (which is often immediately or a few seconds later).
It's not as easy to do for trolls to set up a server, but comments, posts, favourites, votes, edits, and deletions should be considered public when it comes to most fediverse protocols, unless the server does not federate (like truth.social) or only federates with a few select servers. It's trivial to edit software like Lemmy to keep every edit or undone vote, and there's nothing your server admins will notice.
Huh, I didn't know kbin did that. Useful!