Regular visitors to this blog may have noticed that for a few weeks now, there no longer is a trackback facility here. I'm a strong believer in trackbacks; they're an important tool for better connecting the distributed conversations which take place across different sites in the blogosphere. Unfortunately, however, trackback as it exists today remains a highly vulnerable technology; because of its extremely lightweight protocol, there's no reliable way to protect against spammers trying to game the Google PageRank of their Websites by posting thousands of trackbacks with links to their sites all over the Web.
Yes, there are trackback spam filters or general pre-publication approval functions which will at least ensure that such spam trackbacks are never visibly posted to my site; all that's left for me to do is to delete the spam from my trackback queue and to publish the small number of legitimate trackbacks buried in all the spam. But as I found out the hard way, by the time the spam has arrived, the damage is already done.