It is eugenics once you start digging into it and having a conversation about the etiology of the social problems being discussed. As a former LWer, I regret to inform you that a great deal of utilitarianism on LessWrong is eugenics without explicitly mentioning the belief in an essential origin of human qualities that one wishes to promote or demote. There are many naive members of the community who don't or refuse to see it, and a large contingent of manipulative people who know exactly what they're saying.