Hey, sorry for the delayed reply. I think it's more me than hubski--so far hubki's conversation level seems very high, and I don't think anyone would be rude or mean-spirited. I do see a lot of passion around certain topics, however, and I wind up keeping my opinion to myself because I'd just rather not engage and spend all my time on hubski defending my viewpoints instead of using hubski as a jumping-off point for the greater internet. And I don't want to mute anyone (at least not yet) because while I may totally disagree with someone's perspective on feminism or basic income, I might still want to hear what they have to contribute to a conversation on colonizing Mars.
The Personal Curation Algorithm (tm) is kind of a double-edged sword in that way--while I may prevent someone from going off on me for my regressive attitude toward tax policy, I also prevent myself from experiencing all the other positive things they contribute to the site. Hence, I choose to keep my opinion to myself when I'm obviously and dramatically outnumbered on a particular issue.
Edit: Also, I tend to be a lurker more than anything. I'm trying to get better about it, but I can't post much from work, and I don't have internet access at home. Makes it difficult.