Benja's hope seems reasonable to me.

I'd hope so, since I think I got the idea from you :-)

This is tangential to what this thread is about, but I'd add that I think it's reasonable to have hope that humanity will grow up enough that we can collectively make reasonable decisions about things affecting our then-still-far-distant future. To put it bluntly, if we had an FAI right now I don't think it should be putting a question like "how high is the priority of sending out seed ships to other galaxies ASAP" to a popular vote, but I do think there's reasonable hope that humanity will be able to make that sort of decision for itself eventually. I suppose this is down to definitions, but I tend to visualize FAI as something that is trying to steer the future of humanity; if humanity eventually takes on the responsibility for this itself, then even if for whatever reason it decides to use a powerful optimization process for the special purpose of preventing people from building uFAI, it seems unhelpful to me to gloss this without more qualification as "the friendly AI [... will always ...] stop unsafe AIs from being a big risk", because the latter just sounds to me like we're keeping around the part where it steers the fate of humanity as well.