This seems to be an internet meme, because it's repeated in every discussion on this topic but I never see any citation for it. It also doesn't seem to hold up

This seems to be an internet meme, because it's repeated in every discussion on this topic but I never see any citation for it. It also doesn't seem to hold up to scrutiny - even if the initial packing of the vehicle holds everything in place, what happens once a few packages are removed?