I used a system improperly over the course of a month. It connected to some services that ran up a $50k bill. I was mortified when my boss told me, thought for sure I'd be canned on the spot. I was only 22 and it was my first job out of college, so the amount was nearly double what I was being paid. The boss basically took the heat for not having explained it to me better, and I was not reprimanded in any way.