For my community ( !actual_discussion@lemmy.ca ) I would adore this as long as it's available to Mods of the community the downvotes are in and Admins of that instance only. It should absolutely not be visible for normal users.

We are hit with downvotes nearly every time we post a new thread on anything even remotely controversial so it would really help us filter out people who simply downvote to bury the thread and contribute nothing whatsoever to the discussion.

If you disagree, we want to know why and discuss that with you. It's the entire point of our Community.

Heck, we actively made it a rule to not downvote unless the user is not adding to the discussion, and that it should not be used as a disagree button. People generally ignore this, however.

That or just add the moderator option to disable downvotes for Communities. It would be an incredibly handy toggle.

EDIT: For an example as to why it should be implemented, see this post you're currently viewing where I give reasons, how it's been impacting us, some alternatives, and people hit the "fuck you" button with zero discussion and that's all. This is the problem.