[cestith]

Free speech repeatedly has been held by the US Supreme Court to include anonymous speech. There are also free association rights involved. https://firstamendment.mtsu.edu/article/anonymous-speech/

While the protection of anonymity is not absolute and must be balanced against other factors, the same is true of free speech in general. You don’t have a right to defraud people, defame them, directly incite a riot, or to manipulate markets with false statements for example. You likely don’t have a right to create a deepfake and represent it as the words and actions of another person without their permission.

Deanonymization can be used for harassment, stalking, prosecution, ad targeting, serving civil lawsuits, criminal investigation, and any number of other purposes both benign and nefarious. It’s honestly akin to stalking itself when it’s done to a private citizen by a private citizen.