[throw0101a]

> At the point where you stop filing nonresident returns, you ought to make sure you have essentially zero ties to the state. The nonresident returns you filed should have had a mailing address in a different state. Your drivers license should be from a different state (or expired). […]

All of this rigamarole is probably necessary because there have been people in the past that were (tax) residents but tried to argue they were not to get out of paying what they owed. So now all the honest people have to jump through extra hoops because some yahoos in the past tried to 'work' the system.