The internet was a bit different more homely in those days. Back in 1996 we hired a guy as network administrator. On his first day at work, we got an email from a network admin who was reading Usenet. He'd seen our new guy had posted the root password for his former place of work on Usenet (as some kind of revenge for something or other) and had managed to work out where the guy was now working and our contact details. We frog-marched our new employee out of the door and changed all the passwords.