For a while I worked on a 3rd-party/collect-call billing system for a major telecom company. For several days after starting, technical discussions mentioned "inmate" every few minutes. Still getting my bearings, I finally piped up in a meeting with "surely it doesn't mean what I think it means, what is this 'inmate' you keep referring to?" Indeed it meant "prison resident". The problem was that inmates very often abused the phones, rattling thru call menus until they could get a live operator - then proceed to berate/insult/degrade/abuse/etc the person. Result was that our call processing had to ensure that, at every juncture, prison inmates were NEVER able to reach a live operator - and a bunch of money got sunk into this system JUST to mitigate the rampant abuse by prison inmates.