I have never been in a hand with a $100k+ pot, but in higher-stakes tournament and cash play ($1000's per hand) you will still see the dumbest bluffs and calls. There are a lot of rich people playing poker, and with alcohol involved people care even less. It drives the grinders crazy but that's the flip side of trying to take money from tourists. It's quite possible the player accused of cheating (who apparently didn't even buy in with her own money) just made a stupid call.
