One of the worst cases I remember involved a government contractor employee who was deliberately sending classified data in e-mails to his friends because "everyone has a right to know this stuff." When he was caught by the local security people, they took away his computer and his security clearance. He turned out to be a friend of the cabinet official who ran the organization he contracted with. The cabinet official directed that the security people immediately restore his clearance, his computer privileges, and quit harrassing him!! It was finally resolved, but he sent classified information over the internet for more than a year while it was sorted out among the managers.