It's not quite that simple -- boiled down it has to do with security clearance and your ability to get it. The government has told it's employees, and it's contractors and their employees, if they're not specifically authorized to view the classified material then their security clearance can/will be revoked--along with their jobs. It also coul have a bearing on your ability to gain clearance, or higher clearance, in the future. If you knowingly/willingly view classified material you were not expressly authorized to view, what's to keep you from doing it again in the future?