This is for the Sitewide privacy options for WordPress Multisite plugin
When in Super Admin - Options where you select the Default Setting and Allow Override you can choose:
Only allow a registered user to see a blog for which they are registered to. (Default Setting)
No (Allow Override).
This takes the privacy option out of the blogs "settings" menu, but the "Search Engines Blocked" link at the top of the dashboard (Top Left) next to the site link will take the blog admin to the change privacy page.
The blog admin can also just paste
and change it as well regardless of the default setting.
Is there a way to really button things network wide?