Okay, normal person is fine. As for how he got on this ship. (a thousand lies and a good disquise). Well, the greatest way to keep employees happy is fear. Might as well do the same for the officials? Lies to get on the ship, fear. I mean he's not that crazy that he's a danger to everyone on the ship! The reason he gave the officials for being let on. He needs to get out of there. The things he did, got a few people upset. Some very powerful people. The only way to destroy him is to erase him completely. Which is why he is leaving earth.