I don't have a date for that story - but I would expect it was before the widespread adoption of Touch Tone in 1963... And maybe the authorities were more lenie

I don't have a date for that story - but I would expect it was before the widespread adoption of Touch Tone in 1963... And maybe the authorities were more lenient then, as well as with faculty. I think this was probably late 50s or early 60s. I imagine DTMF was deployed at MIT before it was done nationwide. Not trying to rewrite history - just saying theres a lack of detail in my comment and yours.