Up to 1.6 we haven't had any restricted stuff in Irrlicht. But now we have AES and LZMA, guess it could raise problems. But only for folks in the US AFAIK. So we won't have any problem with setting this to completely unrestricted
And since we have had people from Iraq and Iran on the forum (and hence using Irrlicht) I guess there has had been some way to get Irrlicht from all around the world.