It is not pure scumhunting at all, it's a spin off of the simple guiser test and instead of scum hunting you'd have people guiser testing, which has nothing to do with scumhunting.
The guiser doesn't have to guise.That's part of the point. He can choose to guise into someone who think will survive lylo or stay himself. Town has to deal with the possibility of guise and no guise. And OGI isn't allowed right? They can't whisper codes either.