I just had an argument with a friend of mine from college about this. He's part of the "I wouldn't buy it so it doesn't matter if I steal it" crowd. I pointed out that the person who smashed his car window and stole his radio couldn't afford a radio, so what else were they to do? He said that's different, it's a physical object. Making a copy isn't stealing anything. To me, as an economist, whether something is tangible or not, it has value. Your time has value, your effort has value. So when you pirate that game, it's no different than someone stealing something of value from you. Because of you, that developer's kids won't be getting vaccinations this year. He reasoned, "you mean they won't be getting ferraris this year."
And I think that captures a lot of the argument. The entitled attitude of pirates drive me nuts. It's their way of "sticking it to the man" because he's just some faceless rich guy, so it's ok to steal from him.