Yes, and plenty of people have spoken in the public square anonymously too, because no attempt is made to unmask when the speech isn’t accused of breaching law.
Publishing a book anonymously in the public square still means someone has to physically manufacture it, distribute it and convince you to read it. All these steps are subject to interdiction by the police.
Publishing a book anonymously in the public square still means someone has to physically manufacture it, distribute it and convince you to read it. All these steps are subject to interdiction by the police.