Originally Posted by 1Aturnleft

If it were available for space I'd agree but I was under the impression it was an International rule: When the bin is full, close it. I'd wager that thought had gone into this but not for the reasons you've given. If he really wanted to be helpful he could have tipped them in on their sides rather than their backs - the 737 sky interior bins are designed to take bags side on in this way to make room for more bags.