There was a segment on casino surveillance on an MSNBC Las Vegas show last night. At one point, some casino surveillance manager showed eye-in-the-sky footage of a 2 deck Blackjack dealer that was holding his card pack in such a way that the next card to be dealt could be seen. The surveillance manager stated that this dealer was involved in collusion and that the tape helped prove that. All the tape showed me was that this was a poorly trained dealer. It didn't prove collusion.
To the next-card and hole-card players: once a casino figures out your play, do they generally assume that the dealer was in on it? Or do they understand that there are simply weak dealers out there who are susceptible to such plays?