It's been my understanding that G&F (wardens) don't play a role in trespass issues - beyond maybe game retrieval.
Well they write tickets/summons. And have the unfortunate role of playing mediator between landowner and hunter.
If said land in question was not posted exactly per the NDGF state proclamation, the wardens will likely advise landowners that pursuing it would be a waste. That was the case for me, and some others I know... Either the local SA office won't take the case, or it get's contested in court and charges dropped. As they should. The law is the law right..... Lessons learned by landowners, post properly, and move on. If it was only that simple for some.
Again, criminal trespass through the Sheriffs office, must be a different story. I don't know how hunting violations differ from violations through a sheriffs Dept? I do know someone who got charged for 1 old sign buried in some tall grass on an approach in the middle of a quarter. Complete BS deal. That could have easily happened to me, or you. But the NDGF was not involved in that deal, it was 100% sheriff dept.
I just think in the end there is no consistency in all this, from county to county, sheriffs dept to sheriffs dept, warden to warden. With a no trespass law, it's pretty damn black and white for all.
I'm absolutely not advocating for a no trespass law..... But I have been on both sides of this issue, unfortunately. I don't know what the answer is..