just create them on-the-fly as submitted. The problem will be spam, I would have an API key that's created upon captcha signup that's attached to a submission, and opens up new capabilities. Maybe too complicated.

Ideally I could create a plugin, that would load a new random page from category UI after every press, then at the top of the browser would display some metadata attached to a page, like a "further info" link.

Perhaps you could create a category tree that users populate, and then allow random tags to associate -- like YT videos - choose a category but then attach madeup tags - that would be best.