Well a lot of people have what they consider proof that the powers that be are working against them. They see something and rather than weigh the possibilities they immediately categorize it as something sinister. You can go on
Youtube and find videos of traffic lights that someone feels proves they are being controlled and changed based on who is driving down the street.
I'm in no way suggesting that you did not see someone flipping through the cards. I'm only saying that it could have been something normal, routine, and completely proper. Or maybe it was rigged. I just wonder how you can be so positive that what you saw was improper. You saw someone flip through the cards and that has morphed in to a story of rigged drawings and searching for a mark. I'm sorry, but I am just not confident in your interpretation of the situation. After all, in a room of 30 people it isn't too difficult for 29 of them to convince themselves that it was all rigged against them.