If you could change two things about the CodeIgniter forums, they would be...

[eluser]iamsen47[/eluser]
Auto-delete(or hide from view) spam when/if thread/post is reported more than X no. of times.

That would reduce the moderators' workload and clean up the forum. Knowing that one person can make a difference will also encourage users to be more pro-active in reporting spam.

Then it will be up to the thread owner to report to the moderators to prove that they aren't spammers.