Barnaby would routinely party until 5am then deliver the first talk in the morning. And deliver the talk well. His research was good, but then again so was the research of others who weren't nearly as much fun. Conference organizers aren't robots.
His hard partying ways were well known in the security community. Reading all of this conspiratorial talk reminds me how foolish we can be when we talk about people we've never even met.
Does anyone seriously expect a bunch of other well known hackers to admit in public that they routinely binged on drink and hard drugs with Barnaby? Merely to put to rest wild speculation by some randoms who didn't even know him and will likely continue to believe whatever they want to believe?