My intuition agrees with all you've written. But one possibility remains, and that is that our intuitions are wrong and the OP is purposefully lying to attack a

My intuition agrees with all you've written. But one possibility remains, and that is that our intuitions are wrong and the OP is purposefully lying to attack a target. The odds of this needs to be reassessed particularly in light of content-generating AI tools. Constructing years worth of plausible blog posts and comments to support your story is rather easy, now. It would be simple to copy the work of a target, insert it into a generated, plausible-looking blog, and claim IP theft. The email assertions are easy to fabricate (interestingly, if the OP can prove the existence of those emails, that would be better proof than the blog!) It's a scary prospect because AI invalidates most of our heuristics about fraud and plagiarism, and therefore our intuitions can't be trusted. (e.g. we can no longer rely on the heuristic "geez, it could be a con but who would bother to put in so much damn work for such a small benefit?" argument.) (It's also interesting that this is basically a fundamental trade-off of higher productivity. I would wager $10k that within the next 2 years startup land will get caught with its hand in the AI sock puppet cookie jar more than once.)