The only issue with auto locking overhead bins is if they fail. Imagine a fire breaking out in a device stowed overhead, the auto lock malfunctions and the crew cannot get access to fight the fire.
The whole bag issue is just indicative of today’s society…..in that people pick and chose which rules/laws they will obey.
Only this afternoon I was out running and some chap almost knocked me down whilst using a mobile at the wheel.
Sadly I really don’t see a definitive solution.