Just had one single person go through my entire profile and downvote every comment and post except for those that I assume they're de-federated from. And now, thanks to this nifty little tool at votes.gregtech.eu, you can see exactly who has voted on your posts in most cases. So I was able to block this person and avoid having a stalker downvoting everything I post.
IMO, users like this should be named and shamed so that everyone else has a chance to block them and remove bad actors from their Lemmy experience. We've got !fediblock@lemmy.dbzer0.com for admins to sus out bad instances. Why not something like that but for users to sus out other users? Or would that count as doxxing or something?