Though it be akin to beating a dead horse, i must say that there is no discouragement from the creation of alternate characters.
Welcome to Final Fantasy, the game series where half the time you can do whatever you want whenever you want and you are not bound to a single role. Many of us enjoy the freedom to not have to log out and back in on another character in order to change roles. that being said, there is nothing preventing you from having alts and using each alt as a separate pool for tomestones et cetera.

Also, why do you want to have an alt? if you do not need it, why do you desire to separate your roles? I could understand the item storage issues, but other than that i see no reason other than "just because."