Related: Chat user has no parent user.
In the question above, a chat user's profile showed a link to a parent user, but that parent user turned out to be deleted when attempting to visit it on the parent site. Lately, I've seen the Stack Exchange chat user Processed Meat post chat messages without having a parent user link at all. That is, instead of their parent user link being a dead link, they appear to have no parent user at all.
How is this user chatting without any semblance of a parent user to give them the initial minimum reputation required to chat? Is this a grandfathered user from a time before chat users had to link in a main site parent user? Was this user's parent user not only a deleted user, but a deleted user on a site that was completely deleted?
This doesn't seem to be a relic of the past - a review of the chat user's recent tab shows that they have chatted as recently as today.
Yes, a review of this user's recent posts indicates strong bot-like behavior, but bots in chat are held to the same basic technical and privilege standards as the rest of us.