...the central justification for the advocate's immunity is the principle that controversies, once resolved, are not to be reopened except in a few narrowly defined circumstances. This is a fundamental and pervading tenet of the judicial system, reflecting the role played by the judicial process in the government of society. If an exception to that tenet were to be created by abolishing that immunity, a peculiar type of re-litigation would arise. There would be re-litigation of a controversy (already determined) as the result of what had happened during, or in preparation for, the hearing that had been designed to quell that controversy. Moreover, it would be re-litigation of a skewed and limited kind. No argument was advanced to this Court urging the abolition of judicial or witness immunity. If those immunities remain, it follows that the re-litigation could not and would not examine the contribution of judge or witness to the events complained of, only the contribution of the advocate. An exception to the rule against the re-opening of controversies would exist, but one of an inefficient and anomalous kind.[4]