I'm not a lawyer but I have been on jury duty three times.
I don't think Kato's extradition examples are pertinent. In the US there is a distinction between criminal and civil court. This is purely a civil matter whereas the examples were criminal.
As far as downloading images go, my opinion is this: if your http client engages in a valid http protocol connection with a server and the server honours your HTTP GET requests, then it seems unreasonable to me that you have done something that you shouldn't have. But I don't write the laws.
It still boggles my mind that certain sequences pressed on your keyboard can get you in trouble. I like to think of it as
My cat can get me arrested or sued by walking on my keyboard effect. This is related to
illegal numbers.
Poking around on
http://www.npg.org.uk/ I've yet to find the hi-res pictures or the TOS. I'll keep looking.
I work as a contractor for a .gov agency. There's this feeling (don't know if it's official policy or not) that non-sensitive information produced by the agency or its contractors (on its behalf) should be public domain because the public paid for it.