In the early 90's I worked for Louisiana State University's AG Center purchasing department and had a mainframe TSO account. I figured out how to use Gopher to various other research universities and download weather satellite photos and other various weather data (sometihng I was interested in at the time). I was then able to subsequently use Zmodem downloads over a 3270 dial up session to do this from home. I thought being able to get this info was pure magic at the time, since it was primarly only available to researchers.

My supervisor got the next month's TSO departmental chargeback bill for my user account from the University's IT group, and it was tens of thousands of dollars of TSO time :). They told me "don't do that anymore"