"Are you sure that no code you've written infringes on US patents? Or is used on a website that encourages the wrong type of copyright infringement?"

You seem to be implying that if a UK programmer writes some code, and then somebody goes and uses that code for copyright or patent infringement, they are at risk of being extradited to the US... Nothing like that has ever happened and it bares no resemblance to the article under discussion.

I'm implying both that, or that I distribute some software that infringes a US patent. How do we know that the overreaching arm of US corporations won't try to sue some little guy in the UK over this?