HN is small and heavily weighted towards programming-related types. You don't see that kind of behaviour widely upvoted in the smaller programming-related subreddits either.

I'm a heavy Reddit user who steers well clear of the default-sub cesspits, and I basically never see it.

We're a much smaller community with a much smaller scope in topics as well.

Reddit is another animal.

HN moderation is design in a way that forces very slow growth, which controls the content of new posters/posts.

You can't get to an X-million posting community with that style.

FWIW, Slashdot comments sit between HN and Reddit.

Also, HN intentionally avoids most controversial kinds of top-level post content that Reddit explicitly encourages in subreddits.

Could I ask you for an invitation to lobsters?