If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threads page before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.
Also, "monogamy versus hypergamy" has been discussed on Less Wrong since the dawn of time. See e.g. this post and discussion in comments, from 2009. Deciding now that this topic is impermissible crimethink seems like a pretty drastic narrowing of allowed thoughts.
In my opinion, the problem wasn't the topic per se, but how the author approached it:
comments in every Open Thread on the same topic, zero visible learning.