It depends on the location and size of the plant. If you are growing 1 ten foot sativa in the middle of a field you'll have issues. Really what it comes down to is using your judgment. There is a risk with everything done in relation to MJ. Try to camouflage as best as possible and scatter them throughout the area... don't have them growing on top of one another. Myself, for example, am growing lowryders. In my area, the choppers are only used in August and September. I can have my first harvest done by mid July. Aerial view is out of the scenario that way...