I literally could ( and indeed have) stay up to 6 am on the internet on websites like this one, or forums. I mean right now it is 2 am!
But i think there is three good reasons for doing this:
1. You can read some interesting stuff, and in ways build your understanding of people...
i stay up all night most nights on the internet, cos i work mostly late shifts at work, and i come on line onto ep, and i lose track of time, mainly cos most of the people i chat with and am friends with here on ep, are in America lol!!! and im in Scotland!!