I consider myself to be in the category of 'seasoned traveller' and I wouldn't hesitate to leave all my carry-on baggage in an evacuation situation.
I always keep my passport in a trouser pocket, along with my wallet and phone; everything else, computer, iPad, etc etc etc, is not that important to me and is also backed up somewhere else so is not to be worried about.
In fact, I'd probably get into a spot of bother in such circumstances because I would not suffer the stupidity of these people and that could involve physical action, especially if such people were blocking the aisle while getting things from the locker.
We're not all muppets!
