Actually, I think this more of an oversight on Intuit's part than their intentions...
The state modules are registered as components of the TurboTax desktop application in the Windows Registry. Uninstalling the application does not clean up these registry entries, and as long as a reference to a state's module component remains there, the common Intuit installer is going to download and re-install it. You may be able to control that a little by disabling the automatic updates in the menu bar.
To actually get rid of the references to the unwanted state installation (WARNING: I do not have any other Intuit products installed), what I did is uninstall TurboTax, delete the files in the C:\Program Files (x86)\TurboTax and C:\Program Files (x86)\Common\Intuit directories, and then run REGEDIT.EXE and search for "TurboTax" and "Intuit" and delete as many entries as I could, especially the state module registrations. Then when I re-installed, only the state modules actually applicable to my return got installed. Maybe a Registry Cleaner utility could do this too.
So it can be done... just clean up your registry after uninstalling.
