So I equate it to "theft of services". Let's say I get a massage, and then I just walk out the door and don't pay for it. I have clearly stolen that person's valuable time. Which isn't a perfect analogy becuase they have finite time vs being able to make infinite copies, but either way someone worked hard with the intention of getting paid for it, and there are people out there depriving them of the money they would have gotten (and please don't say "but I wouldn't have bought it anyway! which is also crap, becuase most people are downloading music they would have bought, its just the nature of blockbusters vs the long tail). So I don't know what the word is, but it is definitely closer to theft of services than anything else I can think of.