[sa05admin]

Possible solution (?)

put the posts in a forum, then make it a category

see the admin page http://example.org/forum/bb-admin/forums.php where example.org is replaced by your domain

It would mean having to unmark the forum as a category while loading the questions and they might see a forum which is open for a short time, to create topics in but any rogue posts could be removed by moderators.