Quote Originally Posted by DB_Hunter View Post
I don't think releasing them of without the use of force would kill the host. In Naruto's case, it is a simple matter of opening the seal which would release Kurama's chakra and let him leave the host body.
Now that you say that, I can't remember at all hearing Kurama talking about leaving Naruto's body even when he was malicious. He was always about taking control of the body (and then just going beast mode). Maybe it just assumed that it could self-release the seal.. but then his having control would indicate that he was already free..