A couple of years ago, my sis and her husband got a call from a neighbor: "Do you guys know what's growing in the far quarter?" They were MORTIFIED!!! both had grown up very well behaved, and lived by the book. They immediately called the cops, and informed them. The cops came out, took a look, said some kids had probably sown it there for personal use years before, but since it had been growing wild for so long, it would have no "smoking quality"! They also said that they probably would never get rid of it completely, as they produce sooo many seeds.
Years ago, in hair school, my roomates boyfriend used to grow it. We lived behind McDonald's. I gained 35 lbs. That's my story.