Woah, woah, woah. Who knows whether or not the dev's for the site are going to come up with a way to prevent users from gaining points chatting through the Comment box on profiles?! Just remember -- a majority of users gain AP that way, and if people aren't able to earn AP by chatting, then we'll be seeing fewer kings :P
Anywho, King is the highest rank... and it'll probably stay that way because, let's face it: it takes a damn long time to get up there.