Downvotes are disabled on Beehaw, and I believe that downvotes from other instances don't federate - i.e. they're only visible on the instance the user downvoted from. If you're on a massive instance and you view a popular community you'll still get "useful" numbers of downvotes but otherwise it'll mostly be upvotes.

I think Lemmy does need a more nuanced downvote system (e.g. you need to select a reason or there's a quota or something), but I'm not sure how it'd work with the wider fediverse.

Edit: I should have scrolled more, two people had already written this comment).