Private category for each user

[Heliosurge (Dan DeMontmorency)]

If your Self Hosted this plugin should maybe do the trick.

Private Topics Plugin

Summary Private Topics Enables private topics in a regular category Repository Link GitHub - communiteq/discourse-private-topics Install Guide How to install plugins in Discourse Features This plugin allows you to add an extra security setting to categories so that users can only access their own topics. You can also designate one or more groups that can see all topics in the category. This is typically used for providin…

This plugin the Op can only see their topic and a configured group. In your use case create a group if needed add a null user to the group ie Discobot or create an empty user. Activate the user manually disable emails and set user to private. Set group to private.

Here you can disable admin from viewing

With this you only need to create 1 category. Very uncomplicated this method and hands off.