I downvote really obvious trolls, mean spirited comments and the occasional spam submission. I don't downvote people I disagree with generally. If I see a comment that has been downvoted IMO, undeservedly, I will upvote it.
Ditto. I hate the spam submissions.
I down vote every story about the wars in Ukraine and the Middle East. There are plenty of places the Itchy and Scratchy Show can be followed by aficionados. HN isn't the place for that.
How do you down vote submissions? I thought you could only down vote comments.