I am reading Less Wrong at 1AM even though I need to get up in the morning. Rationally, I would get better return on my time from sleeping. Rationally, it's pretty clear that, wrt my major goals of managing my life and my job, Less Wrong is more of a hazard than a potential benefit, as the time I spend on it it has often had a considerable negative impact on me. So I'm using Less Wrong to help me be irrational and lose. :P