See table qa_userfavorites > Field "nouserevents".
I have checked all code, nowhere is an explanation what "nouser" is.
Maybe I am missing a vocabulary here since I'm not English mothertongue?
@Scott: Please add an explanation to the code, what is it - in case you know. Maybe just gidgreen knows...
I only see in qa-db-install.php the short comment:
'nouserevents' => 'TINYINT UNSIGNED NOT NULL', // do we skip writing events to the user stream?
Is this it?