Clippy's original expression of outrage over the offensive title of the article would be quite justified under such a decision theory for signaling reasons. If Clippy is to deal with humans, exhibiting "human weaknesses" may benefit him. In the only AI-box spoiler ever published, an unfriendly AI faked a human weakness to successfully escape. So you all are giving Clippy way too little credit, it's been acting very smartly so far.