... you would be shocked by how much could be surveilled back then. Pretty much any voice communicated were sent in the clear. It didn't much matter whether it was sent over wire or over the air. Snail mail was virtually always sent as clear text. Even digital communications were rarely encrypted. Even ignoring the legality of it, few people had the creativity to envision a world of secure communications or wanted to expend their (limited) computing power on it. There were, of course, exceptions like the military.
Who's being sarcastic? My point is precisely that a typewriter is not a magic bullet, and I lived back then; I assure you I am very well aware.
I really do grow frightened of people's reading comprehension on the internet, having observed a qualitative decline especially in the last twelve months. Granted, this seems more due to indolence than actual impairment, thus far at least, but atrophy must eventually tell.
... you would be shocked by how much could be surveilled back then. Pretty much any voice communicated were sent in the clear. It didn't much matter whether it was sent over wire or over the air. Snail mail was virtually always sent as clear text. Even digital communications were rarely encrypted. Even ignoring the legality of it, few people had the creativity to envision a world of secure communications or wanted to expend their (limited) computing power on it. There were, of course, exceptions like the military.