I wish lemmy and piefed didn’t use downvotes. Just upvotes buttons.
But even then, an ideal forum imo would be one without any of that stuff. Like 4chan, except without the trash community that they have
Edit: Case in point, as soon I posted this comment, it got downvoted. Instead of having people engage and explain their points of view, maybe even have an interesting discussion about it, downvote buttons serve as an immediate "disagree" button. It's a design that dicentivizes discussion