There was a time on some UNIXes where you could just write to other people's tty...

		yencabulator on July 26, 2023 \| parent \| context \| favorite \| on: Got called to a professor’s office after a complai... There was a time on some UNIXes where you could just write to other people's ttys, no write/wall needed, just echo >/dev/... Making write/wall sgid, and restricting tty write access to that group, was a significant security upgrade back in the day.