Property line treestand, how to handle.

Exactly...... Why live next to someone you got fight with every time there is a issue.

I'd probably start with a no trespassing sign in front of it, but greghopper is correct. If the limb stand is on is overhanging your property, you have every right to trim it off, so long as you can do so from your property.

I deal with this stuff all the time, it's frustrating.
My long term goal is to have an all weather road around the perimeter of farm, so it's darned obvious when you come to the line, then vision screening via pines, hinge cutting, piled timber, Egyptian wheat, etc. so they can't see in to the interior. Then make the interior of your farm more attractive to the deer with food and cover, and life is good.

I went around the property on the quad with all the dogs and brother in laws dogs every morning until they got the idea. Sometimes I went by several times. Or just turned the quad off and let the dogs do there magic while they were in the stands. Guys were from Ohio, bow hunting right on the line. They would wave, I would wave back. Never saw them since. Screwed my hunting up for a bit, but it worked.

Agree with boonechaser a conversation with other party is how i would approach it.

Try to keep it civil. Coming back tonight I saw a light on the hill (not on my property) and heard whistling. Whistled back and noticed the light started coming my way. Walked over and it was one of the guys who has a hunting camp across the road.

He got separated from his son and thought I was him from a distance. He apologized and said he didn't mean to be on my place. I said no big deal and helped him find his way back. Talked a little bit on the walk out.

He asked where my property ran and such, which I would hope he'd already have a rough idea given he's nearby. Seemed like an OK guy, talked about teaching his son to hunt the right way.

That hunting camp has been there for a long while and for all I know he has the neighbor's permission, but that said, I'll be posting some no trespassing signs on that border before we head home.

So that's my long winded way of trying to say take care of business, but the last thing you want is trouble with the neighbor.

The direction the stand is facing doesn't define the hunters intentions. Maybe they're playing the wind to put your property on their downwind side? I stand 80% of my time in stands. I hang some stands to use the tree itself to block my movements and silhouette putting the tree between me and expected route of deer.

If it's on you're property do something about it. If it's not, buy your neighbors property.

I at one time probably would have done the same thing, but as I have aged I could not go through the trouble of doing this at a cost of me loosing quality time in the woods, yes it is wrong what they are doing, but heck I have come to the conclusion killing deer ain't the most important thing I need to accomplish in life. Life is much better being positive than the negative outlook I once had. I will admit sometimes it is a struggle keeping this new outlook I want to have. Grin and bare it it can always be much worse.

Couldn't of said it better myself, having a good standing relationship with neighbors is essential to having a good hunt. Until they do something wrong or illegal I would let sleeping dogs lay where they are.  If that line does get crossed then you could pursue other avenues.

Yep...