Ok, that was the final straw!
There had occasionally been minor floods of spam-comments, like a dozen or so and then nothing or not much for days or weeks. Then in the past 24 hours there were over 150 of them! I’d like a game of poker as much as the next person but after all that comment-spam from these poker sites (I assume, given the keywords used) I’ll have a bad taste in my mouth next time I actually play.
So now I’ve gone and installed Spam Karma 2 and I get to sit back, cross my fingers, and find out how well that works for me and this site.
All the settings are pretty much default, which I assume are sufficiently sane, but I will of course keep an eye on the logs to make sure I’m not accidentally blocking legit comments when there are some, every few months.