For what it's worth, I've found reddit and H distinctly different in the down voting behavior. Reddit will down vote on disagree (depending on subreddit) no matter how the info or opinion is presented, but in my experience where it appears HN is down voting on disagreement it's more that the presentation was too forceful.
The biggest example of that IMO is people presenting opinions as fact rather than something to be explored. This can be subtle, and in conflict with how people debate or often discuss between two people, but given it's a public forum, a sprinkling of "I think" or "it seems to me" in in comments goes a long way towards not only not triggering some people into down voting, but also seems to promote more useful discussion around the topic as those or others seem more likely to voice their differences.
> a sprinkling of "I think" or "it seems to me" in in comments goes a long way towards not only not triggering some people into down voting, but also seems to promote more useful discussion
Agreed on this for sure. My comments used to get more downvoted (or at least less upvoted) before I started pointing out that they're just my opinion. Bonus if you mention your opinion on the subject is loosely held and open to correction (personally I love it when someone says something that causes my mind to change! Fresh neuron connections, free dopamine!)
Originally I thought that people would just assume everything I wrote without citing any sources is my opinion but I guess folks just need to be reassured sometimes :)
The biggest example of that IMO is people presenting opinions as fact rather than something to be explored. This can be subtle, and in conflict with how people debate or often discuss between two people, but given it's a public forum, a sprinkling of "I think" or "it seems to me" in in comments goes a long way towards not only not triggering some people into down voting, but also seems to promote more useful discussion around the topic as those or others seem more likely to voice their differences.