Earlier quoted context omitted.
Theatre Sports (competitive collaborative dramatic improvisation) has the concepts of offer , accept , and block . Accepting an offer means to build on it in some way, as a real part of the scene - in the way you mean. A block is when you ignore or undermine the offer , denying it instead of building on it. There's temptation to do so for a cheap laugh. The uncharitable negativity of HN seems similar.
One thing that took me a while to understand as a player - accepting doesn't always mean ignoring conflict. If you offer me something, I accept that your version of reality is true; I don't have to agree with specific parts of it. For example, if someone starts a scene with "Isn't it lovely to be here in Paris?", I accept that we are in Paris, but I don't have to think it's lovely. The takeaway from this to non-impro…
Why? They perfectly highlight what's the "good common-sense reply" is like, how we should measure with each other opinions and how to handle disagreements.
HN might as well included the conversation as an example.