I think that a conception of heroic morality (basically, whether or not to use TDT, or choosing between act and rule utilitarianism) may be at the heart of many of the choices to be cooperative/nice or not. Many people seem to assume that they should always play the hero, and those more virtuous ones who don't seem to think that you would never be able to play the hero.
As an example, consider assassinating Hitler. It's not clear how Hitler could reprise this -- he is already killing people who disagree with him, and he is a single tyrant while you are an invisible individual. This does not apply, however, if you are in equal factions, say Fascists and Communists.
In the case of the Singularity, I'd say that most people don't consider probability and very largepayoffs.
I think that the answer to this problem is that it will simply be neccesary for class oppression to be ended then.
Already we have been able to keep culture and hope alive in the midst of near-genocidal wars. Excepting mistakes such as a UFAI taking seriously "survival at any cost", I think that the risk of survival's demands trashing human joy is greatly lowered since 1950 and is unlikely to return.
THe simulations look like they might have been developed using the tech from Half-Life 2, but with terrible quality animations. If the simulations were highly immersive, I might freak out because zombies. They also look less realistic than sequences seen in a number of popular violent video games (some of which offer considerable applications to apply utilitarian or unutilitarian choices.
Telling people with no exp. on violent video games to play Mass Effect all the way through, and record all their choices, and hesitations might be interesting for the cost.
Have never used a blade. I have always had acne and other skin problems that would make it impractical, plus it was just what my parents introduced me to in adolescence. But definitely not wet.