If it was right on the property line and facing your property then there might be an issue. However, if it is sitting at least 10 feet back, then it could just as easily be argued that it is set up for side shots at deer crossing over from your property. But who knows, if you ask nice maybe he will move it. Or, maybe he will tell you that if you dont want him putting up a stand within ten feet of his property line then he doesn't want you walking that close to his property line....