To permanently remove the notification center,
In terminal
Code:
sudo launchctl remove com.apple.notificationcenterui.agent
This will prevent it from launching in the first place - since setting the permission to make it unavailable pollutes the syslog as the launchd process attempts to load the notification center continuously.
To get it back
Code:
sudo launchctl submit -l com.apple.notificationcenterui.agent -p /System/Library/CoreServices/NotificationCenter.app/Contents/MacOS/NotificationCenter
no fuss no muss, no permissions to reset.