Report suspicion on a client and add it to this node's blacklist.

        :param clientName: name of the client to report suspicion on
        :param reason: the reason for suspicion

def reportSuspiciousClient(self, clientName: str, reason):
        """
        Report suspicion on a client and add it to this node's blacklist.

        :param clientName: name of the client to report suspicion on
        :param reason: the reason for suspicion
        """
        logger.warning("{} raised suspicion on client {} for {}"
                       .format(self, clientName, reason))
        self.blacklistClient(clientName)