You are stealing: downvote. You are playing music too loud: downvote, right away. Driving too fast: downvote. Slow: downvote. You are charging too high prices for sweaters, glasses: you get downvoted. You undercook fish? Believe it or not, Downvote. You overcook chicken, also downvote. Undercook, overcook. You make an appointment with the dentist and you don't show up, believe it or not, downvote, right away. We have the best patients in the world because of downvoting.
I think that sites really shouldn't have guidance on this sort of thing, because nobody would follow it anyway. If you only have upvotes and downvotes, people are just going to upvote stuff they like and downvote stuff they don't like, and any individual will have different rules about what "like" or "doesn't like" means to them.
Waaaaay back in the day, I did like how Slashdot had different categories for voting, e.g. "Insightful", "Funny", "Off topic", etc.
Can't disagree with this enough. Twitter exists, and it sucks. Every site that only allows upvoting becomes a segregated cesspool as different factions just cheerlead in their own tribal zones.
I wonder how it would work if we had different kinds of upvote/downvote.
Then again if given a choice between "I disagree" and "you're a moron for saying that", people would just pick second if it is a disagreement about something they feel strongly about
When my comments get downvoted, sometimes I can figure out why. It's frivolous, off-topic, just plain wrong, etc.
But quite often, I have no idea whatsoever, and I'm always curious about what the issue was. I think potentially valuable information and personal learning is lost.
In my experience it's when you post something that someone has a strong opposing opinion about. Same for flagging, seems to be treated as a super-downvote most of the time.