First of all, i agree, it is wrong to hunt someone elses stand without permission. And i would be outraged/skeered if i got out in the woods, looked up, and saw an armed person in my stand. But confrontation in the woods just isnt on the top of my list of favorites. Think about it, your mad, your yelling, theyre afraid they are going to get in trouble, they may be yelling, he has an arrow knocked, you are just carrying your bow. There are a lot of odd peope out there so IMO, i dont think u should confront them. Post your property lines, rotate your stands around, but i dont think you should walk up angry to someone with a weapon...... Call a game warden or someone with legal authority to confront them once its certain that they are illegally hunting.