Your gear is still not more valuable than the life of another passenger.
Are you sure about that? The insurance pay-out for a human life can be remarkably low.
A couple of comments up-thread have hit the nail on the head; people change their behaviour in response to
incentives, not nebulous threats such as 'you might be arrested if you take your luggage' or vague hand-wavy mumbling about Warsaw Conventions and compensation for lost property.
Stating that passengers will unquestioningly receive money-in-the-hand as soon as reaching the processing facility after an incident should encourage compliance. And the money has to be serious; in the many thousands of dollars. Take the cost of some of the proposed measures ( locking overhead bins etc ), divide by the number of evacuees per year and you'll have an idea of what level is required.