A comprehensive (5,000+ words) look at weblog comment spam: what it is, how it works, and what you can do to fight it. Written by yours truly, but several folks at Six Apart contributed significantly to the final product.
The background information is intended for non-technical weblog publishers, and attempts to explain why comment spam is such a complex problem. The recommendations are geared toward Movable Type users, but the concepts should be helpful to anyone dealing with weblog spam.
★ Tuesday, 4 January 2005