While not on this same scale,I once had a slot attendent,accompanied by a security guard,fill a nickel slot I was waiting to get paid off on with quarters instead of nickles.They were quite thankful when I pointed out the error,and a slot supervisor comped me to lunch for both my honesty,and the extended wait to get paid.
What sucks about the story above is I've been buying stock in Harrahs,so its my money those low-lifes abscounded with.