I made a comment asking "Is HN not for women? I think it's for everyone." a couple hours ago. It got +7 karma since. And yet, it's now not shown (it's folded) b

I made a comment asking "Is HN not for women? I think it's for everyone." a couple hours ago. It got +7 karma since. And yet, it's now not shown (it's folded) by default. It never happened to be before on HN. Can someone explain what feature is this? BTW I see that it happened to majority of comments. What the heck is going on here?