True. Sorry, being facetious there.
I think this is an interesting case, because with Abu Hamza, the general consensus was "get this fucker out of the country", but with McKinnon, they were looking for any legal reason not to (given public outcry about the UK being America's bitch, if nothing else).
I guess it should have been easier with Hamza, because he wasn't actually British.
I have to say, as a UK citizen, if I was to do (while in Britain) something the 'Merkins don't like, I'd quite like to be tried here, rather than there. While their legal system may not be "less fair", it is certainly different enough that I'd need a US attorney (because they know the law), but I'd like a British lawyer as well, as I don't know if I could trust the American to be looking out exclusively for my interests rather than the country which I'd mightily embarrassed (see also Richard O'Dwyer).
I think, as well, they people generally understand "do bad things, go to prison", but it's a bit more of a reach to expect them to have "do bad things, go to a prison in a faraway land away from your family and friends, possibly for the next 30+ years". So you can't just claim to be thinking of taking your own life in Parkhurst, but if there's a possibility of ending up in Riker's Island, you might have more of a case.