4) The post author guy is also the author of the bot and he set this up.
Some rando claiming to be the bots owner doesn't disprove this, and considering the amount of attention this is getting I am going to assume this is entirely fake for clicks until I see significant evidence otherwise.
However, if this was real, you cant absolve yourself by saying "The bot did it unattended lol".
Totally possible, but why bother? The website doesn't seem ad supported, so traffic would cost them more. Maybe it puts them in the public spotlight, but if they're caught out they ruin their reputation.
Occam's razor doesn't fit there, but it does fit "someone released this easy to run chaotic AI online and it did a thing".
Improbable, the OP is a long-time maintainer of a significant piece of open source software and this whole thing unfolded in public view step by step from the initial PR until this post. If it had been faked there would be smells you could detect with the clarity of hindsight going back over the history and there aren't.
While it's good to question what you read on the internet, you're making me realize how dire the situation really is. If someone targets you with AI, you can't even defend yourself without being accused of making it all up for attention. There's no way to win this game.