Good point bigcountry. I think its less a matter of law and more a matter of respect for the landowner in most people's minds. It's just that law represents it in a tangible way.

If someone knowingly breaks the trespass law in a situation but is respectful of the other person's property - meaning not damaging it in any substantially physical way - and agrees to pay the consequences - meaning any citations or fines that accompany it - then I have no problem with it. But that is me. Others have different viewpoints and are entitled to them.