I can hopefully clear up a few misconceptions.
1. Some states require you to be there 1 year before matriculation date. That's the date you START vet school. I imagine others set it before the application date.
2. Most states have a clause in their stuff saying that moving FOR SCHOOL is not allowed. Generally, you should move for another reason, like a job. If you move and are not gainfully employed, you may be denied in-state status.
3. Not all students who move are "gaming the system". Or, even if they are to an extent, they aren't all just jetting in for four years and jetting out. In my case, I applied to Cornell, didn't get in, and re-evaluated my life. I live in the south now because that's where I want to be, and where I want to stay after vet school. I'm proud to be able to apply to UGA, and have a chance of getting in, which would be pretty slim out-of-state.
I'm dismayed that the NCSU admissions counselor would have his own state residency rules that he applies on top of the ones actually agreed upon by his state in a democratic process. If he feels that his policy is better, he should lobby the state to change its policy. Otherwise, every resident should be treated equally.