Pardon me if I don't seem neighborly.
I have had cows shot, gates left open, irrigation pipe crushed by vehicles, roads destroyed and gullies started by ATVs, fences cut, gates stolen, and crops destroyed, all by trespassers. Most of these were "sportsmen" of some kind, including varmint hunters, deer hunters, trappers, hog-doggers, and just plain poachers.
We have a yearly influx of these "sportsmen" from ATL and Florida who apparently think a lease on a 500 acre plot is equivalent to a deed to the whole county, fences, signs, and property lines be damned. That's in addition to our home-grown white-trash poachers and jack-lighters.
It is a sore subject.
As a lanowner myself, I understand your frustrations. But I also know that when I talk to people and explain to them why it's an issue, I get alot better results than when I'm not nice. I usualy don't have issues with the same one twice.
As a hunter who has been trespassing on the trail of somthing and run into the land owners. I have had discussions with them. Not once has one turned me back around when I repectfully explained my situation, and repeatedly apoligized for my transgression.
I would find it hard to believe that everone at one time or another hasn't tresspassed. It happenes wether you mean it to or not, it's how you deal with it thats important.