@Big John - "These allegedly-intriguing legal issues aren't really specific to the Potterverse. Any universe with magic will do."
I disagree. In Middle Earth, the legal system is largely feudal: the local lord decides. The Shire does seem to have some code of law, but it doesn't seem to be consistently enforced; Bilbo had a lot of trouble re-acquiring his possessions after been declared dead.
Conversely, in the Potterverse, the legal structures are frequently referenced: the Misuse of Muggle Artefacts law, the Decree for the Reasonable Restriction of Underage Sorcery, there's two trials at the Wizengamot shown, characters are imprisoned, released and escape from Azkaban, 28 Education Decrees, the list goes on. There is also a lot about how law, society and a free press (well, a slightly beetle-napped Rita Skeeter, anyway) interact in the rise is extremism. It's easy to see the influence of JK's time with Amnesty International.