Elderberry, a name holds no information about who a person is. An age, a title or a career allows someone to draw stereotypes about that person.
People do not change under a pseunodym,, if people know personal stuff about the person behind that pseunodym. For example,some people may know that, behind the name FrothyDragon, I'm a 38 year old married mother of six kids, (ok, I'm not, but I don't want to give true facts, here...) and address me differently to how they'd address me as an 18 year old single mother of one child. People will make assumptions, based on what they know about someone, not their name. And I suspect that's what makes Mary Beard uncomfortable. :)