[unescape]

HN is a pretty close second, especially after they added comment collapsing

Isn't comment collapsing in HN the same as downvoting? I find this confusing - or maybe I just don't have enough karma for the actual downvote button.

[sbierwagen]

Collapsing a thread is absolutely not the same as downvoting the parent. It's just a display toggle.

[ehsankia]

On the topic of thread collapsing on HN, I honestly can't believe they still haven't fixed the performance issue. It's not noticeable on small threads, but go to one with thousands of comments (like the iPhone X one), and try collapsing. I've seen threads with noticable 1-2 seconds delay for every collapse.

[kidproquo]

Are you getting confused between the down arrow to down-vote and the [-] button to collapse? I am assuming there's a down arrow, since I don't have the privilege to down-vote :-)

[jedberg]

Collapsing only hides it for you.

With enough karma you get a downvote button.

[reificator]

It'd better not be, I collapse good comments all the time when looking for something specific.