The magic behind JoahG/cc-ban_chrome-extension.

ban.js

(function () {
    if (typeof (CCDATA) === 'undefined' || typeof (CCDATA.page.user) === 'undefined' || typeof (CCDATA.page.user.id) === 'undefined') {
        alert("Insufficient Data. Please try again on a valid Codecademy User page.");
        return false;
    } else {
        $("body").append("<form action='/admin/forums/ban_user?user_identifier=" + CCDATA.page.user.id + "' class='button_to' method='post'><div><input name='_method' type='hidden' value='put' class='ui-inited'><input data-confirm='Are you sure you want to ban this user from the forums?' type='submit' id='BAN_FORM_SUBMIT' class='ui-inited'><input name='authenticity_token' type='hidden' value='" + csrf_token + "' class='ui-inited'></div></form>");
        $("#BAN_FORM_SUBMIT").click()
    }
})();