Back on topic - I read this thread a few days ago and found the idea as ridiculous as most of you seem to. However, I was very surprised to be on a JQ flight from AKL-CHC the other day and hear the FA announce during the "Welcome to Christchurch" speech, something like "If other passengers have already retrieved their luggage from the overhead lockers then please wait until the aisle is clear before stepping out to retrieve yours". That wasn't the exact phrasing, which I wish I could remember, but I was amazed at the message.