"We received multiple CoC violation reports about a DEF CON Village leader, Chris Hadnagy of the SE Village," organizers said in a post on the conference's transparency report, referring to Code of Conduct violations. "After conversations with the reporting parties and Chris, we are confident the severity of the transgressions merits a ban from DEF CON."
They did not witness whatever event this was, they are relying on witnesses.
Publishing those witness statements would be negative to the witnesses, the accused, and to defcon.
Basically you want everyone to put themselves in a compromising situation to satisfy your curiosity.
They have told him why he is banned. If he wants to share that information with you or the general public, he is free to do so.
No they wouldn't.
> They have told him why he is banned.
No they didn't.
It's kind of embarrassing to see what's become of the hacker community. They used to be against arbitrary rules and power hierarchies. But they aren't the first revolutionaries that morphed into the people they railed against.