This exact thing happened here in the town I livein and it cost the fence owner $1.5 million in damages when a kid (trespassing) hit the wire and caused severe lacerations to his face. The owner also had a grand jury indictment for criminal negligence. I don't understand some of your reasoning behind your comments, it's actions like this that tarnish the public's view of hunters.
ORIGINAL: falcon
You could start building a barb wire fence down your property line. Put in the posts and then put in the first strand of wire at about3.5 feet. Leave it that way for awhile. Only one four wheeler will hit it. The rest will get the message.
Oh, our place does have a real rifle range on it, to 150 yards, soon to be extended to 200 yards. The place is posted.