After removing People Directory, user names are still searchable

When disabling the People Directory by passing the -Dconfluence.disable.peopledirectory.all=true variable in the JAVA_OPTS, the user names for all registered users are still searchable and automatically populate under the auto-complete suggestions, even after manually deleting and rebuilding the index. Since the purpose of removing the directory is usually privacy, this is a concern for some users.

The request an option to remove user profiles from the search when the people directory is disabled and the user is not allowed to create a personal space.