In Into the Wild, what did Chris's boss at the wheat fields get arrested for? There's reference to "black boxes".

"Black boxes" are devices which unscramble satellite-television transmissions illegally.  They allow people to watch encrypted cable programming without paying for it.  Chris's boss at the wheat fields, Wayne Westerberg, had been in on a scheme to manufacture and sell these boxes, and was arrested in an FBI sting.  Westerberg pleaded guilty to a single felony count, and served a four-month sentence in prison (Chapter 3).