The point of that website is this. IN US law, a person is an artificial entity, not a man or woman. The only way that a man or woman can be a person is by agreeing to be one. But if the man/woman doesn't realize this, he/she doesn't know to say that they are not the person in question, when government asks if they are the person on some paperwork.
The first short clause in the 4th Amendment (
https://www.law.cornell.edu/constitution/fourth_amendment ) says this: "The right of the people to be secure in their
persons... ." What?
How many 'persons' am I? One of your persons is any document, mostly a contract or agreement, that has a name on it that looks like your name - is spelled like your name - and your signature is at the bottom.
Government, because it is an artificial entity, created by men and women, can't attack you, a man or woman, for anything. All it can attack is other artificial entities. If government tries to attack you, it always has paperwork - like an indictment - that attacks the person named on the document. Then government tries to get you, the man/woman, to agree that you are the artificial entity person on the document.
Is an indictment with a name that looks like yours on it... is it one of your persons like in the 4th Amendment? NO? It is a fictitious entity that government created, and placed your name at the top. But you have to let them know that their entity isn't you, or even one of your persons. Your silence on the matter is all it takes for you to agree that you are their person... according to rules of estoppel.
https://redress4dummies.files.wordpress.com/2018/03/office-of-person1.pdf