Ryan Lowe is talking about comment spam issues. I've got a far simpler solution in place on this blog server, and it seems to be working. Now right off, I don't get hit a lot - I'm not running one of the common blog servers, so all my http api's are different. That helps enormously. I've been surprised that the wfw:comments api hasn't been abused more, but what do I know? In any case, what's the thing about most comment spam? Lots (and lots) of links. I simply scan all inbound comments, and archive off (without posting) any comments that have "too many" hrefs (never mind how many that is :) ). It's simple, but effective.