I tend to favor minimal government but I think the USPS was an important outcome of the Constitution to fill the need for a universal and "official" communication channel. But their budget has been butchered, I get misdelivered mail all the time and the DMV tells me I'm not the only one in my town who never seems to get their mail, but there's no shortage of wasteful junk mail. If only I was confident we could nail the execution, I would love to see the Internet embraced as basic, universal infrastructure and an official government communication channel that's more reliable and less abused.
But I dream.
You can mark mail "rejected" and return it to the delivery box or any post box.
https://refuseyourmail.cooperjr.name/how-to
https://faq.usps.com/s/article/Refuse-unwanted-mail-and-remo...
First-class mail can be returned to sender:
https://faq.usps.com/s/article/Return-to-Sender-Mail
Title 39, United States Code, Section 3008 authorizes the Postal Service™ to issue a prohibitory order against a mailer who sends you an advertisement offering to sell any matter that you, in your own discretion, believe to be “erotically arousing or sexually provocative.” You can request the order by completing the relevant portion of PS Form 1500, Application for Listing and/or Prohibitory Order, and submitting it to any Post Office™. The form is available at your local Post Office. Thirty days after receiving the order, the mailer is prohibited from sending you any further mail. Violating this prohibition makes the mailer subject to court enforcement action by the United States Government.
Heads of state have spoken through commercial publications since printing existed. Roughly 1550.
Online Internet services merely happen to be the present iteration of this.
(I'm not saying that the practice isn't without its problems. I'm saying it's nothing new.)