> The fact that they don't somehow tells me there is not much there to go on.
FWIW organizations will often refuse to disclose the precise nature of these kinds of accusations, because it would (a) impinge on the privacy of a victim, (b) start a circus trial in the Court of Public Opinion (which this thread is already becoming) or even (c) further shame the accused, and it's a favor to everyone involved to stay mum.
As external parties whose involvement probably extends no further than commenting on HN, we're not entitled to an explanation nor should we expect one. It could all be a big screen of plausible deniability, or there could be serious accusations at the heart of this.
Use your own intuition to decide if their behavior is in earnest, but speculating what happened is useless (and distasteful besides).