Based on the sample of 24 messages back and forth, it looks like the spammer also had a reply bot because a lot of messages exactly the same canned response.
People had claimed their own email address had been used to post a message. The messages themselves were repetitive and clearly had generated names. Someone ran the entire thing through and reduced the bulk messages down to a handful. I believe there were some attempts to add filler words, but for the most part someone just put together spam bots.
My guess: someone was registering thousands of bots using common swearing words + some number as their password, and this particular spam campaign happened to be particularly large.
I can't, but I've seen it, and have a pet theory that it's encrypted communication. You can't identify the recipient. There may be some communication network running on blogs with weak spam protection.
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