Nothing of the sort. I think anonymity is a privilege that is granted and can be enjoyed while engaging with society or online however anon chooses, up to the point where anon's actions breaks the law.

edit: In the case described here I am especially unsympathetic for anon as they chose to defame someone's real life identity. In this incident there was no proactive monitoring by gov/law/inc. as you so fear. Instead the wronged had to hire private council and prove the defemation in court a priori. Even after proving the impact to their character the judge's ruling is only tentative, giving anon an opportunity to present facts supporting their claims (and if you read the judge's statement closely, had anon presented evidence, there would have been no basis for the defamation suit and no need for unmasking). And even if there is no facts and anon legit defamed the person, anon may still evade justice given the paltry noncompliance fine Meta would have to pay. So let me ask you, would you like to live in a world where someone could baselessly and maliciously accuse you of rape or other defaming acts without consequence?