That or they're downvoting low effort comments

Or someone who doesn't like generic comments. You could paste half those on any comment chain. They're the equivalent of an upvote but the commenters felt the need to say it instead. Good downvotes.

I'm not sure how, but you can find their username on lemmy 💀

Jerboa user?

I would downvote that crap too. Contributes nothing to the discussion, waste of time and screen space. That's the comment equivalent of banner ads