I'm going to repeat my earlier comments here for sake of continuity.
The spammers are here not because they think there's a chance in hell we're going to click those links, but because CD has very good page rankings at Google, et al, and the Google crawler is often here picking up new threads. Thus the links that come from these pages confer a substantial (for a spammer) amount of pagerank to the linked page.
If we cut off that page rank flow (eg force links to contain "rel='nofollow'" - details
here) their incentive will dry up quick.... The bad part is they might not notice it right away, and the links that we DO want to give credibility to, eg team pages and resources, won't have that.
Hence my suggestion was to rel="nofollow" any link for anyone below a certain post count, something substantial, like 25-50+.