Is it possible to lock down comments so that users HAVE to be registered to post. I know I can do it on individual blogs but to cut down on abuse I want this to be how it is across the site - I don't want blog owners to be able to change this setting either.
I can't pull up the code form here right now but you would have to remove the option from the /wp-admin/options-general.php file.
Then open up /wp-admin/upgrade-schema.php and then I think you have to change:
add_option('comment_registration', 0);
to
add_option('comment_registration', 1);
That's where your new blog defaults are defined.
Donncha, is that right?