Pirating software was common. And, ironically enough for this topic, done with data cassettes, usually copied with high-end audio equipment. If I keep using the program I pirated and don't buy it, yes. This is where the whole concept of shareware developed from - a legal form of test pirating. But there is even another level in addition to this when talking about Napster, MP3, and music.
Radios play music for free.
DTV plays songs in CD quality on over 40 stations. Record stores get sampler and promo discs for free. Music is built on the concept of free distribution to advertise the album. They wanted people to buy the albums based on the album and not just one or two songs. If those using Napster are not buying the albums or singles that they have and play repeatedly or keep for a long time are pirates and should be punished.