HA HA HA wow! No dude, the UK farmer in your example cannot be arrested by US authorities. WTF are you sniffing? I'll give you an example I recall. A mass murderer from California - Charles Ing - was busted in Edmonton for shoplifting. The US federal government applied to the Canadian government to have Ing extradited. This is how things are done between soveriegn states. You might have heard of this at some point. And no, webmasters are not going to be extradited to the US for alleged obscenity charges.

Oh too late you guys already made fun of him.