John F Kennedy JR. was a great man and a good pilot. But on the night that he died, he was irresponible. JFK JR. was not licensed to fly at night. A pilot who was licensed to fly at night offered to go with JFK JR. and help him but he turned him down. If that isn't irresponsibility, then I don't know what irresponsibility is.
JFK JR. didn't only get himself killed. His irresponsibility got his wife and his Sister-In-Law killed as well. If you're a pilot who isn't licensed to fly at night, please don't fly at night.