Say there's an alter that all they want to do take possession and rage and yell for no apparent reason that can be distinguished, they're just angry. Maybe they represent anger, or maybe they're just some sort of confused protector. They make angry threats, but they haven't done anything. But the host is afraid of letting this alter out because they think that alter might hurt someone, and in the process of denying them possession it makes that alter even angrier.
Say there are friends of the host. They're willing to hear the angry alter out because they want to help. They're willing to let him snarl and yell at them and mock them and whatever it is that he wants so long as he isn't hurting anyone or anything. But the host often refuses to let the angry alter out. Occasionally the angry alter gets a word in edge-wise only to be shut up and restrained again by the host again.
I realize that I'm speaking hypothetically about an actual situation, so I'll summarize it.
Johann and I have a friend with DID. Our friend has four alters; a host, an opposite gender alter who acts as a twin to the host, an inner-child, and an angry alter whom people on another DID forum our friend uses have been trying to convince him is a protector. We're not entirely convinced that he is, but we're not necessarily convinced that he isn't. We think he may be the core's protector, and just hates the host because personality-wise the two of them are polar opposites. What we do know about him is that he feels like the host censors him and he wants out, but that the host is afraid of him. The alter in question's name is Malice, which apparently the host named him, but he's grown attached to it. Now, Malice will more openly speak to the darker personalities in Johann's mind - such as HIM, Jack, or Ka'el. But our friend is afraid that Malice is going to challenge them and that things will spiral out of control. Thus he doesn't like to let Malice out.
I guess the main questions are:
A) How do we (Johann and I) convince the host to let Malice out if he's afraid of him?
B) How would we safely handle Malice when he's out so that the host will not feel threatened and want to immediately shut him up again the moment Malice says something he disagrees with?
C) Can you think of a better outlet for Malice's anger? (HIM suggested taking him to play paintball or something. Somehow that he can 'hurt' Johann, but not in a way that Johann can't tolerate.)