Ok no waltzing, but you cant stop them from becoming missin-nins. Maybe sound can be the village that missing nins can join, cause I'm sure that in the anime Orochimaru would have taken in anyone.
If the kage accepts a missing nin who could betray the village and steal theyre secret scrolls then why not let it be possible. Cause he can join then just kill all your genins or kill your kage so it should be a human decision in the game to allow others to join who deserted theyre village.
Well we can have only the nine jinchuuriki then we can have like theyre followers or friends who the junchuuriki can give theyre powers to like on Naruto, thatd be kool.
Just make an auction house where you put your item up to sell then forget about it and go your business, then return and collect ur money if anybody bought it.