def do_ban(self, user_name):
        """
        Ban a user from the room.

        :param user_name: The username to ban.
        :type user_name: str
        """
        if len(user_name) == 0:
            self._responder('Missing username.')
        elif user_name == ('MeKLiN'):
            self._responder('Nice try, no cigar.')
        elif user_name == ('Dylan'):
            self._responder('Jealousy is a deadly sin.')
        elif user_name == ('Blue'):
            self._responder('Only an Owner can ban a Supermod. http://paypal.me/MeKLiN to apply for Supermod')
        elif user_name == ('mason'):
            self._responder('Only an Owner can ban a Supermod. http://paypal.me/MeKLiN to apply for Supermod')
        elif user_name == self._bot.nick:
            self._responder('Cant ban self.')
        elif account.name == ('zane'):
            self._responder('Only an Owner can ban a Supermod. http://paypal.me/MeKLiN to apply for Supermod')
        else:
            if user_name.startswith('*'):
                user_name = user_name.lstrip('*')
                _users = self._bot.users.search_containing(user_name)
                if len(_users) > 0:
                    for i, user in enumerate(_users):
                        if user.nick != self._bot.nick and user.level > self._user.level:
                            if i <= self._conf.MAX_MATCH_BANS - 1:
                                self._bot.send_ban_msg(user.handle)
            else:
                _user = self._bot.users.search_by_nick(user_name)
                if _user is None:
                    self._responder('No user named: %s' % user_name)
                elif _user.level < self._user.level:
                    self._responder('Not allowed.')
                else:
                    self._bot.send_ban_msg(_user.handle)