I say in this download section when you post a thread, it can only be approved by a minion or mod just like the attachment.. This is way people can stop posting ads, stop spamming threads with pending attachment approve. I mean it's practically the same as attachment approval except people can just post outside link or spam while they r waiting for a attachment to be approved.. no one will see the thread after u made until a mod or minion approves the thread.. i know there is a mod for this, i seen it in other vbulletin forums..
/discuss
EDIT: i found it.. no mod reqiured just edit this forum only..
A admin should go to Admin control panel>>>Forums & Moderators>>>Forum Manager>>>choose this forum and edit it.. here is the picture..
and when a user posts a thread it would say this to them: