Vegas21 - 2:12 am on Nov 5, 2004 (gmt 0)

I know a couple people who work at Craigslist and apparently they have both automated and manual spam detection efforts in place. They are pretty aware of link spam as they have been targeted for years.

I'm sure you could post some links that wouldn't be spam and they would remain up but they would not last long term as mb points out.