When I see proposals that involve convincing everyone on the planet to do something, I write them off as loony-eyed idealism and move on. So, creating FAI would have to be hard enough that I considered it too "impossible" to be attempted (with this fact putatively being known to me given already-achieved knowledge), and then I would swap to human intelligence enhancement or something because, obviously, you're not going to persuade everyone on the planet to agree with you.
But is it really necessary to persuade everyone, or 99.9% of the planet? If gwern's analysis is correct (I have no idea if it is) then it might suffice to convince the policymakers of a few countries like USA and China.
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.