he's British, so i'll side with him(he didn't kill anyone or do anything like that, if he did, i wouldn't, but countrymen get instant respect), he linked to those sites, not necessarily to gain them downloads, they could have been put there to warn people, but he did not make it clear enough for US government.
he is(as far as i can tell), still a UK citizen, and as such still abides by our laws, as long as linking to illegal sites isn't an offence(can't remember if it is, but i doubt it), then they have nothing on him, they should take down those sites instead, also, whats the point? it's small-time, and makes the US look like bigger A-Holes than they did before(from my experience of the US from my Xbox i can conclude that 90% of them are under 12, and know more insults than god himself... or at least thats what it seems like).