The magic of the PSTN was you could work your way into the bowels of the Military and talk to a guy guarding nukes just by dialing the right number and bullshit

The magic of the PSTN was you could work your way into the bowels of the Military and talk to a guy guarding nukes just by dialing the right number and bullshitting. Today you can't really social engineer your way into unauthorized access on Slack, for example (you have to have an account first). I suppose e-mail is the final remnant of the information wild west. Well, that and public ELK stacks...