“I will slaughter you” – daniel.haxx.se
davidkrider.com
davidkrider.com
The person is mentality ill. Their sentences break with grammar. The have no literal meaning. Commenting on anything they say ("He’s already stated that he’s lost $15M of business") is meaningless.
Perhaps how to respond might be worth talking about. I think it's simple. Do not. Don't blog. Don't email. If you have to, talk to the police.
It's possible they are a GPT. I think if the AI ethics people weren't the awful people they are, this is something they would have discussed by now. The two will overlap and it will become an actual ethics issue, especially when GPT tries to act like they are mentally ill.
FYI The original blog post has updated with more emails (4 now), I think any damage is done, it might be interesting to see how a misfiring brain works, but they are a person - https://daniel.haxx.se/blog/2021/02/19/i-will-slaughter-you/