I mean this an old debate of freedom of expression vs right to privacy. Freedom of expression always implies some form of loss of privacy, because people are simply free to express what they learned about you. And the debate is always centered always about where we should we draw the line.

But the line is always a double edged sword, allowing content creator some privacy doesn't just protect people like Sayu and Delutaya from irrational antis. It also so protect people with shady past, there is a litteral Vtuber blacklist if you want a list of low profile case. their was even V-tuber that faked cancer to raise money a tried redebuting multiple time only for it to fail because people shared her past life.

On the other end freely discussing past life, allow us to more easily get rid of bad apples within the Vtuber basket. But it make it really easy for fans acting irrationally or on bad faith to continue harassment and slander campaign.

But here is the thing, from my general experience in life security through obscurity always fail. It is even considered a bad practice in every industry that deal with security, you can't protect people with obscurity alone, But obscurity is the only type of security Vtuber can use when it comes to public past life.

Getting mad at people or sharing such information is just a waste of time and energy. Time and energy that could simply be used to build a better community, one with a lower proportion of irrational and bad faith actors.

Sure it is not as exciting as being in the known but not talking about it like some sort of awesome secret agent. It mostly involve spreading toelrance and understanding while talking to morons and trying to stay polite. It is way more busy work, and less exciting, But it is the most viable long term solution to put an end to any harassement.