For example, what would be inappropriately off topic to post to LessWrong discussion about?
I couldn't find an answer in the FAQ. (Perhaps it'd be worth adding one.) The closest I could find was this:
What is Less Wrong?
Less Wrong is an online community for discussion of rationality. Topics of interest include decision theory, philosophy, self-improvement, cognitive science, psychology, artificial intelligence, game theory, metamathematics, logic, evolutionary psychology, economics, and the far future.
However "rationality" can be interpreted broadly enough that rational discussion of anything would count, and my experience reading LW is compatible with this interpretation being applied by posters. Indeed my experience seems to suggest that practically everything is on topic; political discussion of certain sorts is frowned upon, but not due to being off topic. People often post about things far removed from the topics of interest. And some of these topics are very broad: it seems that a lot of material about self-improvement is acceptable, for instance.
The parent comment seems to be on +1 -3, and I'm not sure why. (Perhaps because it's a mere list of unjustified preferences, but it seems to me that that's roughly what the OP is actually asking for.)
I'm wondering that too. My best guess is they disagree with either treading carefully about jokes or treading carefully about pro-religious comments. But it's hard to say because very few people seem to be engaging the discussion topic. Downvoting because you disagree with two items out of eleven isn't very helpful.