We have a need to keep specific ideas hidden from the community and even the campaign that they were entered in. Keeping in unapproved is not an option as that becomes cumbersome to manage very quickly. Even using tags.
Ideally a stage where viewing can be restricted to specific users or user groups would allow us to move specific ideas, for instance that need to be analyzed for things like trade secret information, into a secret stage for analysis. If determined to have information that cannot be shared they could remain there, not cluttering the pending approval stage. If determined that they do not have information that cannot be shared they would be moved (manually or using automation) into the appropriate stage, likely an ideate stage.