I've used downvotes some few times in the past. I remember one article I found to be totally crap, this was in the "flame wars" between Bitcoin and Bitcoin Cash. I believe the poster was just repeating rants he had heard from someone else, no good arguments, ad-hominems (argument going like "X is a bad person because he once did Y, X supports project Z, hence project Z must be totally crap"). I didn't only downvote it, but I also explained very well in the comments section why I had downvoted it. I didn't believe it was possible, but the author actually adjusted the article - and I removed my downvote.

(I sincerely believe the toxicity and schism in the bitcoin environment killed the chance Bitcoin had to compete with banking solutions - I wrote a bit about it in another post