JabbR: Admin kick.

gistfile1.js

// ==UserScript==
// @name       JabbR: Admin Kick Banned Users
// @namespace  http://jabbr.net.admin/
// @version    0.1
// @description  Kick mother bitches from JabbR who have been a pesk.
// @match      https://jabbr.net/*
// @copyright  2013+, JabbR people
// @require http://code.jquery.com/jquery-latest.js
// ==/UserScript==

$(unsafeWindow).load(function() {
    //var username = window.prompt("User to kick");  
    var usernames = [
        'ryancat', 
        'brentmartin',
        'djsammartin',
        'nlleymartin',
        'nlleydog',
        'nlley',
        'nickback',
        'jazmin',
        'djcoll',
        'djfast'
    ];
    
    j = unsafeWindow.$;
    var origHandler =j.connection.chat.client.addUser;
    j.connection.chat.client.addUser = function (user, room, isOwner) {
        origHandler(user,room,isOwner);
        if (j.inArray(user.Name, usernames) > -1) {
            var newId = unsafeWindow.chat.utility.newId();
            var activeRoom = j.connection.chat.state.activeRoom;
            j.connection.chat.server.send({id:newId, content:"/kick " + user.Name, room: activeRoom});
        }
    };
    
    setTimeout(doSearch, 1000*10, usernames);   
});

function doSearch(usernames) {
    $.each(usernames, function(){
        var found = $(document).find(".users.current li[data-name='" + this + "']");
        
        if(found.length > 0) {
            doKick(chat, this);
        }
    });
}

function doKick(chat, username) {
    console.log('Kicking user: ' + username);
    var newId = unsafeWindow.chat.utility.newId();
    var activeRoom = unsafeWindow.$.connection.chat.state.activeRoom;
    console.log('NewId: ' + newId);
    console.log('ActiveRoom: ' + activeRoom);
    unsafeWindow.$.connection.chat.server.send({id:newId, content:"/kick " + username, room: activeRoom});
}

Updated to @codesapien's fork. Woot!