Considering that Yom Kippur doesn’t cover Bein Adam L’chaveiro and this is a public conversation and that posting under an anonymous name does not put someone in any official capacity to comment on the matter, (even taking into account possible good intentions) I certainly do think it should pass without comment. And I sure wouldn’t want to be the one making the comment unless told explicitly by a rav.
Not that I’m c’v advocating any lessening of Kovod Shabbos, its simply beyond me how discussing open lashon hara (and unconfirmed suspicions no less!) is helping Kovod anything.