Suppressing Time Machine on Disk Mount

By default, when you are using Time Machine in Mac OS X, every time you insert a drive the system will ask you if you would like to use that drive as a Time Machine backup destination.  If you are like me and you swap drives around a lot then this can get annoying.  So to stop it you can actually just disable a launchd System Daemon,  To do so, simply move the /System/Library/LaunchDaemons/ to another location and viola, on the next restart when you attach a disk Time Machine won’t ask you if you wish to add the disk to your Time Machine destinations.
While this is one way, reader @Chealion pointed out on Twitter that the following command will go ahead and do the same thing without monkeying with launchd:
defaults write /Library/Preferences/ DoNotOfferNewDisksForBackup -bool true;