I remember messing with a self-made blue box at my school's pay phone in the early 90s, mystifying and amazing my nerdy friends. That fun ended when the phone c

I remember messing with a self-made blue box at my school's pay phone in the early 90s, mystifying and amazing my nerdy friends. That fun ended when the phone company visited the school, and it was blantantly obvious who was the culprit in the rash of telephone billing crimes committed from a single pay phone, only after 3pm. No charges pressed, but I had to promise some dude in a suit I had learned my lesson. I hadn't.