I have been scouting a local sheep farm for Coyotes, to help the land owner (he loses at least 5 sheep a year, sometimes more). When we walked the property the first time, he showed me an area where the boundary had been contested and where a hunter had set up a tree stand right on the property like looking into his land (the fence was inside the property line about 20ft).
Sure enough, when bow season started, I was out scouting with my AR15. I spot an ATV parked right next to the fence on the neighbors property. Up in the treestand was the good old boy. He was mighty pissed with me walking down the track, but I told him he was trespassing and that the property had been surveyed and pointed out the stakes marking it. About half an hour later he was met by the property owner and his wife and kids walking the property line the opposite way to me, but he was a lot ruder to them, since they were unarmed. It turned out there was a second hunter that I had missed, who had his stand inside the fence line. These guys are leasing over 300 acres, yet they choose to trespass on the neighbors 120.