Okay I'm going to spill the beans at the risk of getting this guy pissed. I,m detecting the site and during the course of the day, several people stopped by to inquire if I had found anything good. The site happened to be on the walking route to a local fair. Everybody was respectful and happy to hear the history of the site I was working. All of a sudden a car pulls up a parks right on the property I'm detecting. A guy jumps out and starts walking over to me so I take off my headphones and he says "you beat me to it, I always wanted to detect this place" I proceeded to tell him that it took me a year and a half to get "exclusive permission" to detect this site and I cant have anyone on the site with me. He tells me he has his detector in the car with him and I tell him sorry but I'm the only one allowed on the property. He then hands me a brochure and says "any time you want to upgrade your detector give me a call. Apparently he sells @#$%^ detectors. He politely leaves and I thought that was the end of it. As I'm getting ready to leave I see a ruckus going on across the street but paid no attention to it. A few minutes later the same guy walks up to me and says " so, having any luck" after a little chit chat he says " the guy across the street threatened to call the cops on me cause I was detecting along the stone wall! I looked at him and said "Dude, it's a 350 year old house owned by the Historical Society and it's a museum!!!! YOU CAN"T DETECT THERE!!!" As I was leaving, sure enough I see a patrol car pulling into the museum! These are the people that ruin it for us honest detectorists!!!