Personally I find the whole notion of regional differences to be the bane of electronic gaming. Things like censorship, changing specifics of the games to cater to those of other countries is just an insult to the makers of said games. While I have a zero-tolerance policy towards censorship (I'm anti-censor) I can understand then need to help improve on a game that comes from another country. I've played some roms that were never released over to North America and they are buggy as hell. Good games too, but really buggy to play. This is the only real reason I would see the need for regional interference; to polish up a game that's all buggy.