* Send letters.
* In person discussions in private locations are private.
* World War 2 methods of conveying written info is just as good today.
* Your paper diary is private. Your blog and social media is not.
Yes, private. Of course. But, just hypothetically, how will people be able to click on my private diary, which I emphasize is private, and is most assuredly not clickbait, so that they can see WHAT HAPPENS NEXT in my private diary?
/s