Well, the a@@-clowns are at it again. Recently, SF Signal has been inundated with a new (for us) flavor of spam called “trackback spam”. To help combat this, we are using an MT plugin to disguise our trackback URL. Which works, except for the RDF section of the index template. To answer that hole, I had to remove the template tag that generates the RDF which, I think, just disabled trackbacks altogether. Grrr!
Still, better to prevent spammage via no trackbacks than to allow those a@@-clowns to spam us.