I would like to see a locking system for the overhead bins. They auto lock at, say, application of TO power and can only be unlocked manually, after, say seat belt sign goes off. Re-lock when seat belt sign is activated to On, (turbulence or landing) and once again, have to be manually unlocked after both engines shut down. The manual over ride, CC or flight deck, should always be available in the event of a technical failure.