Well considering that a large sub-set of people who hear voices commit suicide and/or kill their relatives in cold blood I would say that yes, central control is necessary.
We commit suicide because our parents, friends, and the community as a whole are trying to forcibly remove something that can never be wiped away, causing anxiety and fear which amplify every negative aspect of the voices/beings/visions. Suicide is never a risk for me when I have someone to talk to who will listen to me and take me seriously. It's a risk when I feel as though my existence is a mistake because almost everyone treats it as such. It's not a mistake. There's a reason why every sz person I know has a very spiritual aspect to their voices. I've accepted it and I listen, and I gain benefit, but most people with such experiences are told there is something inherently wrong with them and that their experiences are artificial. To that I say, it's no more artificial than your reality.