The government has been using Google maps to check the outside dimensions of your place. They also are known to check people claiming agricultural exemptions for fields and livestock. One rancher told me that if they don't see cow trails and you are claiming an agriculture livestock exemption you can loose it.
My daughter is still upset with her Granmother for making dvd's of movies for her on her recorder. She says the penalty is 20 years in prison and $500000 fine. LOL.