Sorry for the vague title, I wasn't sure how to ask this question. There are two active questions on the main page as I write this that have activity attributed to the user m1ndw0rk: Auto sort for tags and Should credit for an idea in an SO Q or A be given by a link to the user’s page?. There was a third until a few minutes ago when someone edited it: Alphabetize tags list.
As far as I can tell, that user had no connection to any of the three questions. They were asked at different times by different people, including at least one certifiable Meta celebrity, and I don't see the user in the revision history for any of them.
The user's profile is oddly empty as well. The lack of personal info could be intentional; I'm not sure which fields are required, if any. But the user also has only 1 rep and zero questions, answers, votes and badges. The activity list is blank, too.
Is this user a system puppet like Community or Sneakers O'Toole, maybe? (I doubt it; there's no profile message saying so.) Is this only happening on my machine and I've gone crazy? (I doubt that too; nobody else in the office is looking at me funny. Well, any more than usual.) Did I find an actual bug? (More likely, I'm missing something obvious, but I'm sure one of you has a helpful cluebat.)