How do I permanently disable Notification Center in Mavericks? In Mountain Lion I was able to permanently disable Notification Center, with no apparent side effects:

launchctl unload -w /System/Library/LaunchAgents/com.apple.notificationcenterui.plist
killall NotificationCenter


However, the Mavericks upgrade process restored Notification Center in all its irritating glory. Is there are reason that the upgrade reverted my disabling of Notification Center? 

Can I disable Notification Center in Mavericks using the same procedure, without side effects?
If you start Terminal, enter

sudo defaults write /System/Library/LaunchAgents/com.apple.notificationcenterui KeepAlive -bool False


and restart, this did the trick for me in Mavericks.