Pfft! Who said anything about doing it with their consent? WoW has private servers already even though they aren't allowed. There is a WIP private server for FFXI now, though it has quite drastic limitations at this point.

SE is a lawsuit happy company that might try to keep them down, but there must be a legal loophole that allows them considering the WoW servers aren't all shut down. In five years FFXI may be inconsequential enough that it's easy to get private servers running in the corners of the internet.