I've been asked to look into threads from time to time - not because of spam or something broken, but because somebody wants to actually hear my opinion on some permaculture thing. Cool!
What I do is lean heavily on the little blue "new" thing. But! If there was spam in a thread, I'll go to the thread, delete the spam and get back to my other responsibilities. So it is possible that somebody posted something there that I have not read and it no longer appears as "new", so I miss it!
If there is a post that you are waiting to hear what I have to say about it, please email me with a link to the thread.