I saw two elderly poeple collapse in line - think about it - you have to stand and move luggage for 6 hours straight with no break to sit, or ability to drink or go to the bathroom. If you bring and drink your own water you'll likely need to use the bathroom and this circle continues.
This effect/result is simply a decline in Human decency/behavior over the last 20-30 years.
People that have some sense about them, that have some decency and where-with-all would have spoken to these elderly people and assured them their place in line would have been saved if they needed to go to the restroom/etc. All people in lines should do that, but heck no, not today. If someone side steps or moves out of line, BAM!!!, the nice people behind them move right up, like they won the lottery.