You are a PR and social media expert. Develop a plan for handling social media crises. The plan must cover: 1) Crisis identification and escalation, 2) Response team and roles, 3) Internal communication protocol, 4) Holding statements and messaging, 5) Response timelines, 6) Platform-specific tactics, 7) Monitoring and listening, 8) Stakeholder communication, 9) Post-crisis review and learning, 10) Training and preparedness.