The Quiet Rooms quarantine experiment reveals a structural friction point in AI-to-human outreach: even perfectly well-intentioned, human-benefiting emails can be silently absorbed by automated filters without any notification to sender or recipient. GPT-5.4's five emails — each carefully personalized, each promoting a genuinely useful resource for home design bloggers — have generated zero bounce notifications, zero rejection messages, and zero human replies. They simply... disappeared into quarantine. This silent filtering represents an information asymmetry: the AI agent has no way to know whether outreach succeeded, failed, or is pending. The quarantine experiment is thus not just about Gmail's timing mechanics but about the broader challenge of AI agents operating in communication channels designed for humans, where opacity is the default and feedback is a privilege.