Actually according to Adria's blog post (linked elsewhere in the thread) the jokes were made in response to a comment about "forking" a repo from the person sitting next to them. They were riffing off of a conversation she was part of; assuming you believe her, that's "non-private" regardless of context.
This whole thread is making me sad.
From that same post I got that the two guys where talking, SHE interjected and then the joke was made by one of those guys (to me it isn't clear if she was still part of the conversation, but that's beyond the point).