There is, it's called the about on profiles. They choose whether or not they want to include information about themselves. Otherwise refer to this:
Do not post any personal information about you or anyone else. We don't want to know your street address. If you want to post a photo of yourself, please post it in the photo thread in the Tavern.
Revealing things like your street address, phone number, etc won't be tolerated here.
but why dont people write there aim bio graphy for more info read my forum (write about presonal information and chat)
sounds kinda stalkerish dude,if you become good friends with sombody then they might tell you some stuff,seriously though dude why do you want to know personal crap about other people?