I had got some picture of a couple guys last year during mushroom season. I printed some pictures, wrote a nice little note on it, and then posted it at the local grocery store, diner, and gas station. It took all of about 4 hours and I was getting phone calls… I haven't had a problem since.
I forget exactly what it said. But it was something along the lines of a missing poster. "Missing mushrooms, last seen with these guys" "Any information would be greatly appreciated" I didn't care enough to want to press charges or anything, but I don't like people walking around on my property without me knowing.
Bowhunter, I think #1 for me is kids. I live close enough to other houses that the kids like to come back following the creek. I really don't mind that at all. I'd rather have them back here playing in the woods and creek than out causing trouble. I've never even approached them about it and I can usually hear them from the house when they are back there goofing off.