Pirates are hobbyists who enjoy collecting and playing with the latest programs. Most pirates enjoy collecting warez, getting them running, and then generally archive them, or store them away. Bootleggers are to piracy what a chop-shop is to a home auto mechanic. Bootleggers are people who DEAL stolen merchandise for personal gain.
Bootleggers are crooks.
They sell stolen goods. Pirates are not crooks, and most pirates consider bootleggers to be lower life forms than child molesters. But, being a pirate is more than swapping warez. It's a life style and a passion. The office worker or class mate who brings in a disk with a few files is not necessarily a pirate any more than a friend laying a copy of the lastest Depeche Mode album on you is a pirate.