Reminds me one of my old bosses hired someone. And then HR fired them because they had a pot conviction. So then my boss hired them as an outside contractor. Every six months HR would discover he was on the 'no hire list' and terminate his contract and my boss would cut him a new contract.
Reminds me when I worked a big telcom (BT) on of the guys in our section was an ex teenage Phreak and had been done for hacking PRESTEL.
One day one of the feared internal security team who had caught him years ago was in the building and met him and freaked out - our centre mangers politely told him to f off when he demanded that we fire the guy.