Not a trackback spam solution, of
course, but WP Hashcash is a cute defense against comment spam by requiring a proof of work
Funny: Trackback: A Tragedy In 3 Acts. Jason Lefkowitz offers a tongue-in-cheek play set at SixApart, as well as some slightly more sober analysis of how we got where we are today:
When your technology is open to abuse, silence is deadly. You might think that 6A, as the authors of the spec, would have made notice of the deep problems with TrackBack and been on top of finding solutions. Such is the official TrackBack blog hasn’t been updated in nearly a year, and their Professional buy tadalafil online Network lumps TrackBack spam in with comment spam and advises use of tools like MT-Blacklist for both. The result is a perception that no fix is coming, which leads people to abandon ship rather than wait for a fix they think will never come.
not the case: