Scoping by namespaces not working

In my LocalSettings.php I have:
```php
$articleProtectionNS = [
        NS_CAMPAIGN,
        NS_OPINION,
        NS_USER,
    ];
```
However, private ownership is not working on NS_OPINION but keeps extending to namespaces not mentioned such as NS_MAIN, NS_CATEGORY...Is there a way to stop that from happening?