Well I was browsing vBulletin-fr.com, and as a Guest could view some hacks that were posted as code, rather than as an attachment - You need to work on some permission based system there, at all 3 boards and any other site that wants to be "respectful" of the author's copyright and warez issues...
I suggest:
1.) Get people who want access to the Hacks to PM you with their vB.com or .org username
2.) You check it out, and if they have posted in a forum where only licenced members can (vB.org -> Full Releases, vB.com -> Troubleshooting Forum) you give them access
3.) If they haven't, you ask them to, and then if they do not you do not give them access
Satan