Modern aviation etiquette in 2026 emphasizes personal space and hygiene more than ever. One of the top things you should never do is go barefoot in the cabin or, worse, in the lavatory; airplane floors are notoriously unsanitary, and it is considered highly offensive to fellow passengers. You should also avoid bringing pungent foods like tuna or heavy garlic onto the plane, as the recycled air system will trap those scents for the entire flight. Additionally, never attempt to consume your own alcohol; FAA and international regulations strictly state that you can only drink alcohol served by the crew, as they are legally responsible for monitoring passenger intoxication. Other "no-gos" include standing up the moment the plane lands (the "aisle rush"), reclining your seat aggressively during meal service, or ignoring the safety briefing. By 2026, many airlines also discourage the use of "seatback organizers" that hang off the tray table, as they can interfere with emergency egress, so keep your personal space tidy and your shoes on for the best peer-to-peer travel experience.