I was wondering when you would show up Final 3 Greens. I always like to get your take on these things and no, I'm not being sarcastic.
Can't help with your CofA question but I can confirm Bealine's quote about the Kegworth incident. While the situation was unfolding, long before impact, the aircraft was shaking violently and the contents of the lockers where spilling out and injuring people.
This was 1989 of course, so no wheelie bags and laptops and locker design has been improved since then but it does pose the question of how much of risk is having even heavier bags in the lockers above you.
I can see arguments either way, so am not going to venture an opinion (too tired) but it's makes me wonder.