It's not like they have a special radar that detects marijuana plants from helo's. Plus from all the crime that goes on I don't think they have the time and money to go around trying to bust petty cultivation charges on people who probably haven't commit any bigger of a crime. Besides, sometimes you gotta take the chances. Life is full of do's and dont's. And if you don't take too many chances you'll live your life wondering "What if?". Goodluck to you.