Probably too much but I think he is refering
to complete anonimity and that is not the way.
When you have nothing to lose because you hide behind anonimity, you give less weight to the things you share. And you have no value in keeping morals because you don't have a certain image to mantain.
Far different with pseudonymity. Where you still get to have a profile that is not directly associated with your real person but you still try to keep a reputation because of the value your pseudonym have.
