It could be argued that cheated in later rounds because they implicitly fell in line under an after-game threat known as being a social outcast or losing a friend. I would have loved to see this done among a bunch of people who would feel less pressure about offending the others with their decisions during the game. It is one thing for the world knowing you are a scumbag when you go into the game knowing you might do scumbag things, but something else entirely for robbing a friends opportunity to settle some debts or have an amazing holiday they otherwise would have to work really hard for.