pre internet, your name, address, and phone number would published in the widely distributed telephone book. if you were a big celebrity, you could get an "unlisted" number (I think you had to pay for it), but that was relatively rare. you might recall, the opening of the original Terminator film (1984, same time period) hinges on this idea: the robot has a name and a city, he tears that page out of a phone book in a…
Still very much a thing in Norway
It's fine, it's not really abused that much. You can request a protected identity from the authorities if you really do have stalkers but it's a bureaucratic hassle. Mainly since everything in this society relies on anyone wanting to do business with you to be able to look your existence up using your personal number.