I was just wondering how to add these features and/or what do you think about them :
About the /notice command : Would it possible to restrict its access to admins ? Because my users are "emulating" system messages (like "X has been kicked" or stuff like this). Disturbing...

About the list of users connected : Is it possible to order the list by user name, instead of arrival date ?
About quitting the chat : Would it be possible to implement a javascript function which would check if the user has left all the chans ? If the user hasn't left the chans before closing its window, it will warn him he has to write the "/leave" command in its opened chans, in order to close them.
About the kick command : Would it be possible to add a parameter to the kick and ban functions, which would be the reason of the kick (or ban) ? For example : X has been kicked by Y (reason : bla bla bla).
Best regards.