How to disable Bonjour on OSX 10.6 (Snow Leopard)

Bonjour is Apple's zeroconf protocol and iTunes (among others) uses it to broadcast the existence of its shared library, which I find annoying because it's quite chatty on the network. In the past shutting down mDNSResponder was enough to keep it quiet but this doesn't work as intended anymore on Snow Leopard as all DNS activity goes through mDNSResponder now.

Apple's KB explains how to properly disable those broadcast advertisements:

1. sudo vim /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist
2. Add <string>-NoMulticastAdvertisements</string> at the end of the ProgramArguments array.
3. Save the file
4. Restart mDNSResponder:
   sudo launchctl unload /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist
sudo launchctl load /System/Library/LaunchDaemons/com.apple.mDNSResponder.plist

There's no need to reboot unlike what the KB says, as you long as you restart mDNSResponder.