Personally, I too tend toward 'utilitarianism's domain does not include number of people', but I think most people have a preference toward at least minor pop. growth.
Also, many people (including me) are skeptical about ems or emulation in general. Plus, you'd want to colonize universe to build more emulation hardware?
r/Fitness does a weekly "Moronic Monday", a judgment-free thread where people can ask questions that they would ordinarily feel embarrassed for not knowing the answer to. I thought this seemed like a useful thing to have here - after all, the concepts discussed on LessWrong are probably at least a little harder to grasp than those of weightlifting. Plus, I have a few stupid questions of my own, so it doesn't seem unreasonable that other people might as well.