YMMV / Avatar: The Last Airbender "The Guru"

• Accidental Aesop: Do not blab about important state secrets and/or military operations in casual conversation with outsiders, no matter how trustworthy you think they are. Earth King Kuei mentions offhand of the Earth Kingdom's plans to invade the Fire Nation to the "Kyoshi Warriors" (actually Azula and company in disguise), which results in the plan's failure a few months later.