Isn’t this sort of intimidation illegal?
It should be. But...
this federal law only applies to narrow categories of individuals, including:
“Any officer or employee of the United States or of any agency in any branch of the United States Government (including any member of the uniformed services);
jurors, witnesses, or other officer in or of, any court;
informants or witnesses in a Federal criminal investigation or prosecution; a State or local officer or employee whose restricted personal information is made publicly available because of the participation in, or assistance provided to, a Federal criminal investigation by that officer or employee; However, if you don’t fall into one of the above categories, there is no federal law that criminalizes all of the conduct that may be called doxing, such as publishing someone’s contact information. However, there is a federal law against stalking that may apply to many doxing incidents.”
https://www.robertreeveslaw.com/blog/doxing-arrested/