I've been using Spam Karma 2 for a couple of years now to fend off
spam on this WordPress blog.

Every now and again a spam comment gets past SK2 as some cheeky
spammer writes a direct comment specifically for the page on my blog
that they want to target traffic from.

I have a new strategy for the rare spam comment that gets past SK2,
but I still wish all spam commenters would go take a long walk on a
short pier.