My point is that it's difficult in both cases. Especially when there's an option to leave and there's no actual "unmasking." It wasn't unmasked. And he didn't say, "Okay, guys, I'm going to start hinting, catch my gestures."
You can be paranoid as much as you want. And spend half the game checking.

Барон "Vampires"
Отдай свои прошлые сны,
В сомненьях себя обрети,
В бешеном танце душа кружится!
Не думай, что будет потом,
Здесь и сейчас мы живем,
Стань хоть на миг сам собой, слышишь!