I can't imagine why anyone would CHOOSE to sleep at an airport. I had to do it once because my night flight had gotten delayed till the morning and it was absolutely horrible. I couldn't call a friend or anything because I was flying back to my home. It was one of the most sleepless nights I've ever had and I don't think I got more than 20 minutes of sleep. I kept worrying about my baggage and that if I took my eyes off it that it might get stolen.