This topic has been a great interest to me, and have studied it for awhile. All comments are welcome. #1. If somebody sneaks on my property & drops seeds, I can not be held accountable for something that I had no control over. However, they would CERTAINLY search my house, etc. If I am holding ANYTHING that is connected, seeds, grow ligh, roaches, matching footprints, a trail, etc. I'm busted. Point, if You're clean, you can grow on your property.
Why would the Cops call the Owner..... that's stupid, unless the Judge won't sign the warrant, and the law dogs needs permission to enter the property. With that, no warrant needed. Now, did the law ask permission with these phone calls? I think so. To stake out a grow, a LOT of cost is involved, lots of man hours, plus telltale signs, meals brought in, cars, radios, etc.It's not worth their while. Plus, if you can't tell a place is watched, something is wrong. If you are 100 feet way, or just a person walking through the woods is not guilty of shit. They have to catch you, literally harvesting, feeding, etc, before the case can be made. Cutting & hauling the shit may take as less than 10 minutes,... that's the only window they have to bust you, if there is no connection. As a hunter & ex-military, I can tell you that if you sit at night for 1 hour, downwind, to hear everything, you will know if you have visitors. No smoking, farting, coughing, total silence.
Indoor or backyard grows, they have your ass, because friends can't keep quite for 4 to 7 months. I read a lot about bust searching for "Monster Mariajuna Plants". Most times, they miss the grower. They usually only search during harvest time in Choppers. By that time, a conopy of vines could have covered, in part, your grows. Indirect lighting should never be underestimated. Just my take.