In response to the recent post by Simon Goodway, I threw together a simple implementation of the keystroke-approach to comment spam blocking:
It’s quick to install (one small file and one quick change to templates with a comment form). So far I’ve seen a 100% decline in spam, so much so that I’m thinking about turning off Moderate and going old-skoole with my comments.
If the spammers figure out the field I’m using, it’s trivial to change, and could even be automated. There are a number of ways to make it more difficult for spam purveyors, but my thought is that this 5% added difficulty will never be worth their while.