I was poking around with the ignore user settings, and I found that if you use the "find members" link in the ignore options at
https://bitcointalk.org/index.php?action=profile;sa=ignprefs, it will add a name with an escaped newline (\n) for some reason and then updating the profile promptly clears the entire list of ignored members!
Also, I found that the admins can't be ignored. They don't have ignore buttons