Actually I enjoyed reading the conversation, both in terms of game mechanics and the philosophical aspects of it.
In terms of mechanics, I'm finding it useful when feel I have to play catch up w/ aggressive civ's or want to make a quest deadline. Sometime the red frowns will go down with the population and I weigh the length of them against beakers, bread, and coins created, depending on what I am rushing. I will sometimes keep it until I reach the Universal Suffrage where I can use gold instead of population to rush production. But the side effects of annoying random events and the score going down tempers my use of it.
Even though "it's just a game" and obviously I do use it in game play, I'm glad to see the discussion. Candidly there are certain Role Playing Games, First Person Shooters, and Action genre games that I love but I personally think are too violent or gory to play in front of my children and I wait until they are in bed to play them. And there are certain games that I think are too graphic or in poor taste for me personally to play at all. I otherwise don't consider it my business what anybody else does privately for entertainment as long as they don't push it in front of my family.
In terms of Civilization, I think it's probably easy for me to see this civic as just another aspect of game because of how it's protrayed. My gut tells me that if it was shown more graphically in gameplay or displayed as a RL ideal then I probably be much more offended. I respect that various aspects of Civilization are part of representing society in differing stages, phases, and cultural modes, as each matures, just like in RL. And even though Civilization represents the ideal of growth, a lot of it is and will remain personal and cultural bias. There are some of the higher end civics that I think could reflect biases from the game makers if they believe that is the height of civilization. But I'm still cool with that whether or not I would personally want to see them as the end result in a RL civilization I live in. Somehow I would hope that in 2008+, regardless of national identity, that mankind would morally outgrow the need or belief in slavery. I think the game, at least so far, is tastefully protraying it as a historical fact with terrible consequences without making one feel like they are endorsing it if they decide to use it in gameplay.