Bell Telephone will, for a few dollars a month, NOT publish your phone number in a phone book. Isn't that nice of them? But, for a few dollars more, you can have your phone show the caller id of unlisted numbers. That's even nicer.
I'm just waiting for someone to introduce a file format that can't be edited or altered. Like pdf used to be. And then I would give it a month before someone offers a program that will edit or alter that file format. And two years before the company that created the format will offer software to edit and alter it. It's like anti-anti-anti-missiles. Eventually you realize that you are paying for software to create a file format that can't be edited so you can buy software to edit it.