I'd be against it because no one can and should block themselves off from the rest of the world, we need to learn to work together and respect one another. If people can't handle that in a simple online game, then it makes me wonder how they handle it when faced with it in real life.
Also because I would loose many of my friends from all over the world, and no longer be able to play with them. Thats also a reason why I think SE won't split servers, many shells are mixes of people from all regions, not just one region. If they made area specific servers and broke up all the people and LS's I'm sure a lot of people would consider no longer playing because they have been split from their shell... I don't know if I would keep playing.
That is one of the draws of this game that others don't have, international servers and I am used to being on international servers seeing I spent 6 years on FFXI and enjoyed it greatly. I love learning the cultures of all the different people that I meet, how they understand things and how they do things... Our shell loves to help one another and we even have a EU member that wanted to learn more English so we started helping him, and we were just saying a day or two ago how much more he understands and how great he's doing!
Also I always try to be polite, everyone comes from a different culture and if we play with them or not we should be respecting their culture anyway. I think our server is very nice, and a few days before the server went down one of our EU players and a JP player from another shell we know were working together, shouting in English and their own languages, to get a party going. Also the JP players I have met or played with seem very kind and didn't seem to have any problem playing with people from other countries. This is how it should be, all people working together for one goal... not separated.
Edit: Also has anyone else had any problem with RMT, seeing Reika said the JP are? I can honestly say I haven't been contacted once while in game by a RMT... I think I've seen them running around but I never hear them spamming or get /tells from them.
