When I was in high school, I reset the admin password on one of the macs in the computer lab in single user mode and used it to find the school’s Wi-Fi password in the keychain. Shared it with a few friends and it eventually made its way to most of the student body. It was a total game changer for all of us because we all had smartphones (this was in 2014ish) but the building had virtually no cell service indoors whatsoever.