Someone set their email address to 'sixdegrees.martian.cx'. Clearly, a bug I need to fix, that they could do that in the first place. The solution, of course, is I delete them instantly from the system (since I can't very well email them to tell them to fix it, can I?).
Except I typo'd. And, for some reason, was in autocommit mode. So person_id=357 was deleted, when I meant 457. SHIT.
I have no idea who it was.
Now to go make some changes to my environment to make it as impossible as possible to have auto commit on.