Bug/Suggestion for improvement:
Extension:EditNotify should be please fixed so that this (known and mentioned) restriction of its usage is overcome:
Issues of the extension
Users can get notified when a page is created in any of namespace or category, but user cannot track a particular namespace or category. So when you are subscribing for 'create' page notifications, don't include 'namespace' or 'category' within the individual array for that notification.