I would strongly encourage everyone to read HN with `showdead` enabled (it's in your profile page). There aren't actually all that many downvoted comments, and while mosts are low-level trolling, even with `showdead` you see them at the end of the parent thread and they are greyed out, so it's not all that distracting. But being able to see some of the things that get downvoted / killed unjustly (and then vouch & upvote them) is how you get a better HN.

You can upvote dead comments? I can't maybe you need to have some amount of karma.

You can "vouch" for them, which makes them non-dead (and upvotable again). But, yes, it does have some karma limit - I'm not sure if the specifics are documented anywhere, the FAQ just says "small karma threshold".

Yeah, you can sense how strong libertarianism is in the US.

Europeans here steer more in the "we can, but should we?" category, while Americans are in the "move fast and break things" category.

I literally see upvotes during the day (Europe) and then downvotes during the night. Mostly. But the trend is there.