Here's one. It comes (or rather doesn't) from Iain Banks. He is co-signatory of a letter to today's Guardian. In this it is said that:
British troops [in Afghanistan] are killing and dying to protect one of the most corrupt governments in the world: a government that condones marital rape, tortures its own citizens and was elected by massive fraud.
Whatever your opinion of this description of the British presence in Afghanistan, you might think Banks would think that killing to protect a government that condones marital rape and tortures its citizens would sufficiently offend against 'simple human decency' to warrant a cultural and educational boycott, such as he was suggesting against Israel only three weeks ago. And you might think that this boycott should, for him, apply to the US as well as to the UK. But no. It just doesn't go bump, as you might think it would.