If Gannon is there to criticize bloggers as a lynch mob, then clearly the 'ringleaders' of the mob should be present to defend themselves. Even if it is just a pity party for Gannon, you'd think anyone interested in pitying him would like to see Aravosis or whoever squirm.

Unless...maybe they're scared to face reality: they let a story slip through the cracks and they can't offer a plausible denial.

If they just want to hear Gannon's side of the story, maybe they could play journalist and interview him in some context other than a forum/panel.