If you actually read the article on the McKinnon case, you'll see that extradition was ultimately refused by the home secretary - not the courts - on largely compassionate grounds:

"Mr McKinnon is accused of serious crimes. But there is also no doubt that he is seriously ill [...] He has Asperger's syndrome, and suffers from depressive illness. Mr McKinnon's extradition would give rise to such a high risk of him ending his life that a decision to extradite would be incompatible with Mr McKinnon's human rights."