For more subtle cases though - see, the problem is substitution of 'intellectually omnipotent omniscient entity' for AI. If the AI tells to assassinate foreign official, nobody's going to do that; got to be starting the nuclear war via butterfly effect, and that's pretty much intractable.
I would prefer our only line of defense not be "most stupid solutions are going to look stupid". It's harder to recognize stupid solutions in say, medicine (although there we can verify with empirical data).
It is unclear to me that artificial intelligence adds any risk there, though, that isn't present from natural stupidity.
Right now, look, so many plastics around us, food additives, and other novel substances. Rising cancer rates even after controlling for age. With all the testing, when you have hundred random things a few bad ones will slip through. Or obesity. This (idiotic solutions) is a problem with technological progress in general.
edit: actually, our all natural intelligence is very prone to quite odd solutions. Say, reproductive drive, secondary sex characteristics, yadda yadda, end result, cosmetic implants. Desire to sell more product, end result, overconsumption. Etc etc.
Why does SI/LW focus so much on AI-FOOM disaster, with apparently much less concern for things like
Why, for example, is lukeprog's strategy sequence titled "AI Risk and Opportunity", instead of "The Singularity, Risks and Opportunities"? Doesn't it seem strange to assume that both the risks and opportunities must be AI related, before the analysis even begins? Given our current state of knowledge, I don't see how we can make such conclusions with any confidence even after a thorough analysis.
SI/LW sometimes gives the impression of being a doomsday cult, and it would help if we didn't concentrate so much on a particular doomsday scenario. (Are there any doomsday cults that say "doom is probably coming, we're not sure how but here are some likely possibilities"?)