It turned out that I had run afoul of money laundering laws. Once over that figure, if there is any chance that I was using the casino to launder money, my name had to be reported. In Las Vegas, casinos where we play a lot know that we play there regularly, and sometimes the machines spill large amounts of coins. Had we known about this regulation, we could have avoided it. We could have gone to different change booths, or just Shirley take some of them up and me take the rest while not acting like we knew each other.
Casinos are between a rock and a hard place.
Not collecting ID at these times makes them liable for very sizeable fines. And demanding ID annoys the customers. Not for me. As do all responsible gamblers who play for large stakes, we keep records. Our slot club cards will also have that information.