I’m seeing yet another spike in spam so I’ve reluctantly turned on moderation again. If NuCaptcha can plug the hole that appears to be allowing this spam I will, of course, turn it off again.
Interestingly, one mystery is solved. The second group of spammers that I wrote about yesterday—the ones who try to match appropriate comments to the post and then refer to Facebook pages—appear to have been a proof of concept. The Facebook links have been replaced by the usual links to commercial enterprises.