I've seen at least a couple different users with that, but I wouldn't be able to recall their usernames offhand.

The notice really reminds me of the Facebook chain posts where people would post a declaration saying that facebook couldn't use your data/likeness if you share the post text.

If ai companies are unabashed about scraping and training on copywrited material from litigious companies like the nyt, I really don't get how anyone convinces themselves that anything they append to their comments would stop a scraper.