Really loving the new experiences here on Lemmy.one. But I’m seeing many subs with off-topic posts. Community downvotes will help overworked mods find and remove such posts. I understand no one likes to be downvoted but it’s a necessary tool for our community and only helps users understand and refine what and where they are to be posting their content.
As far as your instance is concerned, no one can downvote, even outside of your instance, because downvotes are rejected by your instance. This means that downvotes from other instances aren’t visible to any users of your instance or any other instance that has downvotes disabled, and they don’t affect the sorting of posts.