This is going to be controversial, but it is my honest opinion.
Having flown to a large number of destinations all over the northern half of our planet, and witnessed the insane attitudes & behaviours of a huge number of fellow passengers in all kinds of situations, the only way that you could stop people putting others lives in danger by hauling bags out from under seats and down from overhead lockers is by posting armed sky marshals at each emergency exit to either seriously wound or summarily execute anyone carrying luggage during an evacuation.
Bottom line - your fellow passengers are stupid and WILL put your life in danger.
You just have to prepared to look after number one in ways that don't rely on the cooperation of these lunatics.