yes, give them the infomation
is it the right place to change the code in frontController?
if (isset($_GET['logout']) || ($this->context->customer->logged && Customer::isBanned($this->context->customer->id)))
{
$this->context->customer->logout();
Tools::redirect('index.php?controller=cms&id_cms=6');
}
cms 6 is where i edit the message for these customers