joining madness
Oh, this place baffled me at first, too. On the comm profile page, there's a link that's hidden-in-plain-sight in the sentences just above the usual "Add Friend"/"No I Hate You Forever" icon medley. It says 'To join this asylum, click here.'
Their old version of LJ software didn't seem to anticipate that some people[*cough*like me] just sort of have their eyes glaze over at the cookie-cutter text and start mouse-hovering over the shiny, candy-like icons...