What's the reason we have to browbeat him to constrain the discussion to some specific point?
Particularly on political issues, a "I observed X. Discuss." has the potential to be a trap. Each of the points I made in the grandparent post can be construed as a political attack- the first on women, the second two on the LW community- and simultaneously attacking everyone because of a lack of clarity is, generally speaking, a conversational and political mistake. It's not obvious which issue to engage with, and engaging with the incorrect issue is dangerous.
It's not difficult to deduce what kind of a response to the implication question is a socially acceptable one. I might also have no implication. Even if my implication was benign I wouldn't give you the answer. I don't want to reward coercion or biasing a conversation before it's even started. I don't know why people pretend to expect honest answers to such questioning.
If you expect everyone to be totally biased in the conversation then instead of picking the right soldiers for the battle I would suggest concluding that the topic is simply too political to discuss in a rational manner.
If you browbeat people for making observations on issues that might need fixing you're limiting your options for doing any fixing.
Here is the 2013 edition of the Best of Rationality Quotes collection. (Here is last year's.)
Best of Rationality Quotes 2013 (400kB page, 350 quotes)
and Best of Rationality Quotes 2009-2013 (1600kB page, 1490 quotes)
The page was built by a short script (source code here) from all the LW Rationality Quotes threads so far. (We had such a thread each month since April 2009.) The script collects all comments with karma score 10 or more, and sorts them by score. Replies are not collected, only top-level comments.
As is now usual, I provide various statistics and top-lists based on the data. (Source code for these is also at the above link, see the README.) I added these as comments to the post: