Obviously, CNN's quite capable of faking the news, and then lying about it. Still, that email could be from Bored Housewives Demand Action, or Organizing For America, or whatever Russian bots were actually scripting that event. Of course, that doesn't mean CNN was unaware of it, either. But that's not really a mark against CNN. You'd expect the people asking questions to have suggested questions in hand, from whatever groups they're aligned with. That wouldn't be unethical.