Today I discovered two boarding passes in the seat pocket left over from the previous days flight. Not a big deal but ??

Clearly the cleaning crew missed it (horrors)

It had the names of the two passengers as Mr and Mrs, it had both their ticket number and booking code (no FF number as it had been stamped NO FF CREDIT. It was TPA-DTW in F . It had a big stamp DOCS-OK so I deduced they were on a TATL trip since their arrival time was after 6pm.. My wife challenged that deduction so I took it a step farther when I got home to my computer and the Delta web site.

I was able to bring up their complete itinerary to Europe and back and the ability to change their seats and add features ???? I then could also bring up their FF numbers as well as a list of add-ons such as need for handicap assistance, mobility problems, hearing problems etc.etc..

It struck me that you really shouldn't leave your boarding passes for others to find while your still on your trip

Have you ever checked in for a flight and found your seats were gone and the agent could not fully explain it? A lost boarding pass on an earlier flight might explain it