The legislature wanted to go all posted in 2021 and used the protestors - squatter camps along the Missouri as rationale. There was little push for all land posted in the 2023 legislative session. ND meets every other (odd) year. They came up with the electronic posting which works fine. A bit cumbersome having to rely on signs and the phone.
Open lands are a ND tradition. Comments by Gimruis are not uncommon, but North Dakotans do not care about what outsiders say on this issue.
The open lands are similar to northern MN woods where if it is not posted it is open to hunting. I bet many MN hunters assume it is public land and it often is ... but if you look closely it is often a mix of county (tax forfeited), state, and Federal ownership ... AND certainly private owner parcels often mixed in also. Some of the wood industry companies such as Potlach started to lease or sell their land vs. leaving it open to hunting.
Note that land that is not posted (signs) or electronically posted is often open because the ownership or ownership group is not close by or they do not want to be bothered. There are few (if any actually) ND landowners that are NOT aware of this rule.
When I was a diehard waterfowler - mostly field hunting ... I would ask if I thought the farmer would be disking or adding nitrogen to the soil ... if I was hunting afternoon pothole ducks or pheasant hunting ... I would not hesitate to go hunt if legal to do so.