In the interests of accessibility to more of the general public, I think it's a good idea to have references on the first instance of an acronym or idiomatic concept (especially if it's a main point of the article).

I'm a casual reader of LessWrong, Inside of articles, I usually find some term or abbreviation which refers to a concept I have no idea about. In this article, I came across FAI (which apparently means Friendly AI?) and paperclipping. They're not completely unGoogleable, but not explaining these terms, even parenthetically, seems self-defeating. It's against spreading the ideas in the article to other people who don't already share your views.