Here's what I've been trying to say: The thing that you want an FAI to do is optimize the universe to your utility function. That's the definition of your utility function. This will be very close to the average human utility function because you care about what other people want. If you do not want the FAI to do things like punishing people you hate (and I assume that you don't want that), then your utility function assigns a great weight to the desires of other people, and if an FAI with your utility function does such a thing, it must have been misprogrammed. The only reason to use the average human utility function instead is TDT: If that's what you are going to work towards, people are more likely to support your work. However, if you can convince them that on the average, your utility function is expected to be closer to theirs than the average human's is because of situations like this, then that should not be an issue.