Indeed, our current phone system makes it incumbent upon the person getting harassed to change their number. 25+ years ago there was someone angry at my parents

Indeed, our current phone system makes it incumbent upon the person getting harassed to change their number. 25+ years ago there was someone angry at my parents that used to call in the middle of the night until they changed their (unlisted) number, over and over. Not sure why the person eventually stopped, I guess the game got old. It kind of points to the fact that long before the internet existed, we were bad at building systems that allowed victims of harassment to have any recourse against abusers.