Stabbed in the trackback
A while ago I installed a small script that disallows comments on this blog that are not actually typed in. That is, it looks for multiple keystrokes as opposed to one single dump of text — the behavior of a spambot (or someone who copies-and-pastes comments wholesale). It has stopped 100% of the spam I used to deal with daily.
Alas, the scourge of trackback spam persists. Does anyone know of anything that will effectively block trackback spam? Ideally it too would be a keystroke-based defense, but anything that really works would do. I’d hate to have to shut off trackbacks as they are one of the most innovative things about blogs!