Insomniacs, the Phantoms of the Internet
theodp writes "Ever since she was a toddler, freelance writer Lily Burana has been a Stay Up Late kind of girl. When her kindergarten teacher asked students 'What time do you go to bed?,' young Lily felt compelled to lie rather than rat out her own mother by saying, 'Oh, between midnight and 1 a.m.' She still suffers from insomnia, but has discovered that Facebook is the Promised Land for the awake and alone. She finds comfort in the company of others who, like her, live counter to the conventional rhythm of a sunny-day world."
And here I thought the lack of interaction with people was a positive aspect of staying up late.
I would guess a lot of slashdotters fall in to this category or at least at some point have. But the difference is that I enjoy the quiet and alone time during night and hence would stay away from sites like Facebook. You get insane amount of work done during night time - there's no people chitchatting all the time nor can you really go out somewhere so you don't get lazy. It does however lead to weird sleeping patterns, but as long as you don't need to go anywhere in the morning it doesn't really matter anymore.