There were a couple of folks whose every comment here, irrespective of content, was winding up in the moderation queue. I let this go by until the number of them doubled one week.
I’m not quite sure what to do about it. Perhaps they’ve tightened the little routine that compares incoming email addresses with a local blacklist. (Yes, I do have a local blacklist, containing the names of people who are dead or just dead to me. If you have to ask, you weren’t on it.) In an effort to test this notion, I have cleared out every name in the blacklist. (A few IP addresses remain, but matching an IP address is tricky, especially an IPv6 address, which all of those are.)
I will report back if any results are obtained.