Here's my tale of disaster narrowly averted on Cozumel and the honesty of a shuttle driver:
I landed one day on Cozumel with my wife, my daughter, my mom, and about half a ton of luggage (traveling light is not in our collective vocabulary). We loaded up in a shuttle van and trundled off to the hotel, where there was the usual unloading melee. The whole pile of luggage was never all in one pile after the airport, and when we started getting the rooms set up, I realized that my carryon bag was missing.
My carryon bag, the one bag where I concentrated all the stuff that I ABSOLUTELY CANNOT DO WITHOUT, was gone. Travelers checks, cash, diving regs, dive computers, cameras, credit cards, ID, proof of citizenship, tourist cards... it was all in there.
The hotel clerk helped me call the airport, and she talked to a bunch of people in Espanol rapido, to no avail. I caught a cab to the airport and ran around frantically looking for anyone that could help me, but no one could.
Just when I was about to give up in abject suicidal despair, I heard someone calling "Hey , Senor". I turned, and there was the shuttle I had rode out to the hotel on just pulling in. The driver jumped out, ran around to the back, and said "Are you looking for this?" as he opened the door and there was my bag.
After I calmed down and quit jumping up and down and yelling, he told me to get in and he would take me back to my hotel. I'm not sure how much I tipped him; I just opened my wallet and gave him what was in there.