Second, I think you're missing what Ken called the "First Speaker Problem" (which IMHO is one of the most important parts of Ken's thinking)
> "We want to live in a culture where a joke on the internet doesn't lead to a struggle session at work"
The implication I'm hearing in those word is that the "first speaker" shouldn't be thrust into a struggle session at work for their speech; what I'm not hearing (although your literal words would cover this situation, so maybe I'm mishearing) is consideration into if the joke (or other statement) thrusts someone else into a struggle session at work.
IMHO, to re-use your words; it isn't batshit insane, it isn't gobsmackingly wrong, and it isn't that difficult to understand - whatever principles you want to apply to the responders to the apparent "First Speaker" should also be applied to the "First Speaker" as if they are themselves a responder. (If only because, I'd argue, they are meaningfully actually a responder themselves)