i dont reslly see the need for this. it seems like a far fetched idea that would take forever to inplace into the game.
also being able to jump servers like that will provide larger issues like what happems id someone has the same name as you. it could be a server riddled with lag due to people hopping im all the time and might just end up beeing a hiding hole for when your beimg attacked on your own server. just leave befor your time to chose is up. this idea just seems to me more hassle then its worth