There is an old home that is being used as a crack house and I would like to metal detect the yard. Here is my dilemma - I asked the people who live (or squat) there for permission. They said it was ok with them, but I would have to give them any guns I find. Now they seem all messed up on drugs and alcohol, so I can't be sure who the owner is but they say it's alright. So I guess I have permission, right? How do you guys handle on-lookers and other curious folks with nothing better to do? Does anyone know what a hypodermic needle will ID at on a F75? Has anyone found any good coins at a crack house before?