Dozens upon dozens of spam comments have accumulated since the creation of this blog in 2022, until I changed it to require registration for submitting comments (on Thursday).
I finally went and deleted all of them, plus the occasional test comments by me. They're preserved in the dokuwiki backup repo, however.
Most posts did not have any comments. About half a dozen posts had a lot of spam comments, likely in the hundreds. I never figured out why the spam would flock to these particular posts.
Another mystery is that most spam comments were submitted in pairs, on the same post, at very nearly the same time, and with minor text differences.
All the spam comments deleted now were already hidden, seeing as I had initially set up dokuwiki to screen every comment. As in, comments are hidden by default and administration can show them if desired. Probably the only user-visible change is that the spam comments were counted towards the amount of comments display on the blog landing page.