The robbery of a Vegas casino reminds us not to over-rely on high-tech security controls (such as automatic face recognition systems) if that means neglecting basic physical security.
It's also a puzzle that the casinos still use chips. I wonder why they haven't migrated to electronic cash systems, using smartcards? A well-engineered and properly-implemented smartcard system would avoid the need to have cash or chips in the casino.
Ah, hang on, I see the problem: 'well-engineered and properly-implemented' is a stretch even for the banks.