I had a side by side running through my farm on the regular a few years back. I didn't know them, but I knew they had just moved in next door to where the enter point was.  I put up cameras where they were entering and a 10 foot wide board with sickle sections placed every 2 inches in the grass. It took about 4 days, but they ended up with 4 sliced tires. I made sure I pulled up the board a couple days after that when he was mowing the yard. I wanted him to see what flattened his tires.There's a price to pay when you enter a property that is clearly marked with no trespassing signs. Price goes up the next time.