You are a UX designer. Develop a comprehensive guide to designing for digital signage and public kiosks. The guide must cover: 1) Context of use (public, quick interactions), 2) Readability from distance, 3) Simple and clear actions, 4) Touch vs gesture, 5) Accessibility for all, 6) Avoiding clutter, 7) Feedback and confirmation, 8) Privacy in public, 9) Examples, 10) Best practices. Provide design guidelines.