Ashaman said:
You're keeping the existance of 1 billion+ lving people, as well as a whole other populatedable planet secret because you're afraid of "misunderstandings and confusion"
At what level are you thinking of?? Everyday misunderstandings or the possiblity of war breaking out?? Cause if its the latter, I've got to introduce you to this little thing called diplomacy.? You know, nations do it all the time.
And harmony?? This isn't harmony, its hiding.
People do stupid shit all the time. Is it their right to do so? Even if we think it's laughable, if they want to hide and be left alone, should we drag them into the open?
And do you have the right to turn a fellow magician into an ermine if he disagrees with you?
Legally speaking, it depends on whether you recognize the magical organizations as nations/states with their own laws and such. If they're a sovereign nation, then they have a right to do what has been declared lawful punishment by what constitutes their legal body. If they're not a sovereign nation, then it depends on the laws of the nation (namely Japan) they were in at the moment. This has legal precedent in the formation of the USA, the formation of Communist China, and the formation of the various small countries in Eastern Europe after WWII, the formation of Israel, the formation of the Vatican, etc. (Of course the bigger nation/s often bully the smaller ones anyway, so. . .)
Of course, that goes both ways. If the Magical World decides that all Muggles are squatters (pointing to the large magical population in the "Old World" and the longer history of the magical governments), then legally speaking, they'll be within their rights to either evict every Muggle they catch to Venus. This also has legal precedent and is actually much more common. Everyday, people who have lived for years in a place are forced off their land and follow rules they've never followed before or even known of because the "official" government has never recognized them as a state/nation. The closest (and most ironic) example would probably be when the emergent USA, itself an born of an illegal rebellion, took apart the <a href='http://en.wikipedia.org/wiki/Iroquois_Confederacy' target='_blank' rel='nofollow'>Iroquois Confederacy</a>. If the Magical World tried to reclaim the Old World, it would be entirely legal from their point of view.
Practically speaking? I suspect it boils down to who has the bigger stick. As a federation built of mostly artificial people, the Magical World has its own set of morality, traditions, and laws. A mage turning another mage into an ermine in Japan, is like a US agent shooting an American criminal in Beijing. It would be an international incident either way.