Actually I stand corrected it's every 100 yards. But you can be arrested if you are hunting land that is not properly posted and you "KNOWINGLY REMAIN". But I would think that would be hard to make stick in court. All one would have to say is they must have entered the property between the posted signs and never saw them. Again, a honest mistake on the part of the trespasser. Then that falls back on the land owner for not properly posting their property.

http://www.wildlife.state.nh.us/Hunt...unter_FAQs.htm

This is "common law" that has been on the books from back when the early settlers put the laws in place. So it's not a belief or philosophy but an actual law.